What Is Plural Of Memorandum? | Usage Rules That Matter

Writers run into this noun in law, business, and exams, then pause and ask what is plural of memorandum? You might see memoranda in one book and memorandums in another and wonder which one is right. The good news is that both forms work, but each carries a slightly different tone.

This article clears up how the word entered English, why two plural forms exist, and how to choose the right one for your context. Along the way you will see real sentences, common traps, and a quick practice section you can use to test your memory.

Why Memorandum Has Two Plural Forms

Memorandum came into English from Latin, where it originally meant “that which is to be remembered”. Latin nouns ending in -um often form their plural with -a, so the classical plural of memorandum is memoranda. As English absorbed the word, speakers also started using a regular English plural, memorandums, alongside the Latin one.

Modern dictionaries list both plurals, and some even place memorandums before memoranda as the more common choice in everyday English. Grammarians point out one clear warning though: avoid memorandas, which blends the two patterns and does not count as a standard plural.

Latin Style Plural Memoranda

When you write for a legal journal, an academic paper, or a formal policy document, memoranda often feels like the safest pick. It signals that you know the Latin pattern and that you are writing in a careful style. Many style guides still use memoranda in examples, especially when the text sits near other Latin plurals such as addenda or agenda.

Because memoranda sounds slightly old fashioned, you rarely hear it in casual office talk. It tends to appear in titles, headings, and legal phrases such as “board memoranda” or “policy memoranda”. If your audience expects a traditional tone, this plural does the job well.

Modern English Plural Memorandums

In office writing and business emails, memorandums now appears more often than memoranda. English speakers like simple, predictable endings, and adding an -s to make a plural feels natural. Large news outlets, business textbooks, and in-house style sheets regularly use memorandums as their default form.

Many dictionaries explain that memorandums and memoranda are both correct, then add usage notes showing that memorandums leads in current English. That means you will not upset a careful reader if you choose the English-style plural, especially in internal reports and training material.

How Memorandum Fits With Other Latin -um Nouns

Memorandum does not stand alone. English contains a long list of nouns that came from Latin and kept both a Latin plural and an English one. Seeing the pattern across several words makes it easier to remember what happens with memorandum and its plurals.

Singular Noun	Latin Plural	English Plural
memorandum	memoranda	memorandums
curriculum	curricula	curriculums
datum	data	datums
bacterium	bacteria	bacteriums
forum	fora	forums
stadium	stadia	stadiums
addendum	addenda	addendums

This table shows the same pattern that affects our noun. A Latin style plural in the middle column sits next to a regular English plural ending in -s. Some fields still prefer the Latin forms, while general writing leans toward the English ones.

What Is Plural Of Memorandum? Usage In Real Life

So when you pause during a report and wonder what is plural of memorandum?, start by thinking about your reader. A lawyer speaking in court, a student sitting an exam, and a manager writing a staff email each write for a different audience. Each setting pushes you gently toward one plural or the other.

Legal publishing often stays close to Latin. Many court decisions and law reviews still use memoranda, especially in headings such as “memoranda filed by the parties” or “sentencing memoranda”. In that setting, memoranda sounds normal and memorandums might even catch the eye as informal.

By contrast, business writing now favors memorandums, or even the shorter memos. Company manuals, HR policies, and finance training packs tend to talk about “internal memorandums” or “policy memorandums”. If your reader expects clear, straightforward English, this plural keeps the tone plain and modern.

Evidence From Major Dictionaries

Major reference works back up this picture. The Merriam-Webster dictionary lists “memorandums or memoranda” as the plural and includes usage notes on tricky Latinate plurals. Other dictionaries, such as Dictionary.com, give the same two options and explain that many -um words now take regular English plurals as well.

Writers sometimes worry that memorandums looks less educated than memoranda, yet these sources show that both forms count as standard English. The choice has more to do with tone, audience, and house style than with raw correctness.

Formal Writing And Legal Contexts

If you write for a law firm, a government department, or an academic journal, check the local style guide before you pick a plural. Some legal publishers still ask for memoranda in all formal text. Others accept both plurals but prefer you to stay consistent inside one document.

Within a single paragraph, avoid switching back and forth between memoranda and memorandums. Pick one form and keep it steady, unless you quote a heading or passage that already uses the other form. Readers notice when a technical term changes shape without a clear reason.

Business, Exams, And Everyday English

In business classes and English exams, teachers sometimes ask students to give the plural of memorandum. Many tests still mark memoranda as the expected answer, since it shows knowledge of Latin endings. At the same time, exam boards often accept memorandums as an alternative.

In everyday office life, the shorter word memo usually takes over. Staff talk about memos going out to teams, and few people stop to ask about the longer form. Still, when a textbook or exam uses the full word memorandum, it helps to know both plural options that sit behind the casual memo.

Common Mistakes With Memorandum Plurals

Because two plurals exist, students and writers slip into a few recurring errors. Most problems fall into three groups: mixing endings, mismatching verbs, or misreading the role of similar words.

Using Memorandas As A Plural

Mixing memoranda with memorandums produces memorandas, which does not follow either Latin or English patterns. Style guides warn against this blended form. If you want the Latin style, stop at memoranda; if you prefer the English style, go with memorandums.

Agreeing Verbs With Memoranda Or Memorandums

English still treats both memoranda and memorandums as plural nouns. That means they take plural verbs. You write “the memoranda were filed on time” or “these memorandums are archived”, not “the memoranda was filed” or “these memorandums is archived”.

This point matters in formal writing where verb agreement often forms part of an assessment or a grading rubric. Double check subject and verb around technical nouns like this one, especially when a long phrase sits between them.

Confusing Memorandum With Memo

Memo is a clipped form of memorandum and has its own plural, memos. In some contexts, memos stand on their own and never expand to the longer word. In others, the short form appears in speech while the full form appears in written templates and headings.

Do not write “memoes” as a plural. The standard form uses a simple -s, just like videos or pianos. When you answer test questions, keep memorandum, memoranda, memorandums, and memos separate in your mind so that you match each one with the right plural ending.

Choosing Between Memoranda And Memorandums

When both plurals feel possible, a short set of questions helps you choose. Ask who will read your text, how formal the document feels, and whether a style guide controls your choice. Then match your answer with the rows in the table below.

Context	Better Plural	Example Sentence
Academic article on law	memoranda	The memoranda were submitted to the review panel.
Court filing	memoranda	All sentencing memoranda are part of the public record.
Company policy manual	memorandums	These memorandums explain the new attendance rules.
Internal staff emails	memos	All memos about safety training go to every department.
Business English textbook	memorandums	Students read sample memorandums before drafting their own.
Grammar exam question	memoranda	The test asks for the Latin plural: memoranda.

If you write for several audiences, keep a note of which plural each setting prefers. Over time your choices will feel natural, and you will switch forms without hesitation when your reader changes.

Practical Tips To Remember The Plural Of Memorandum

Short memory hooks help when you meet this word under exam pressure or in front of a blank email window. Each tip below gives you a quick way to link the base word with one of its accepted plurals.

Link Memoranda With Other -anda Words

One way to keep the Latin form in mind is to group it with other nouns that end in -andum or -andum-like patterns. For example, addendum turns into addenda, and corrigendum turns into corrigenda. Seeing memoranda beside these shapes reminds you that the -a ending belongs to the classical pattern.

Link Memorandums With Everyday Speech

To recall the English style plural, think about how you talk in daily life. People at work say “send the memorandums by Friday” far more often than “send the memoranda”. If you hear yourself adding -s in speech, that sound can guide your choice in writing when no strict style rule applies.

Use Simple Sentences As Anchors

Keep one clear sentence in your mind for each plural. For memoranda, you might use “the memoranda were stored in the archive”. For memorandums, you might use “two memorandums reached the board this week”. When a test question appears, replay the sentences in your head and copy the form that fits.

Quick Practice With Memorandum Plurals

To fix the pattern in your memory, try filling in plurals in a short set of sentences. You can write the answers on paper or simply say them aloud. Then compare your choice with the answers that follow.

Fill In The Blanks

• The company stored three __________ in a locked cabinet.
• All policy __________ were updated after the meeting.
• The board asked for two fresh __________ on the merger.
• Several legal __________ were attached to the contract.
• Two short internal __________ reminded staff about the deadline.

Answer Check

• The company stored three memorandums in a locked cabinet.
• All policy memoranda were updated after the meeting.
• The board asked for two fresh memorandums on the merger.
• Several legal memoranda were attached to the contract.
• Two short internal memos reminded staff about the deadline.

Once these patterns feel natural, you will no longer pause over this common exam item or workplace noun. Whether you choose memoranda for a formal setting or memorandums for a plain English tone, you will know exactly why that form fits your sentence.