Is Memorandum Singular or Plural?

Yes, memorandum is singular. It refers to a single written message, note, or communication, typically used in a business or official context. The standard English plural is memorandums, while the formal Latin plural memoranda is also widely accepted, especially in legal, academic, and formal business writing. Choosing between them depends on the tone and audience you are addressing.

Quick Answer

• Singular: memorandum
• Plural (common): memorandums
• Plural (formal/Latin): memoranda
• Usage note: Use memorandums for everyday business emails and internal notes. Use memoranda for legal documents, official reports, or when you want a more formal tone.

Understanding Memorandum in Business Context

In the workplace, a memorandum (often shortened to memo) is a short, direct message sent within an organization. It is used to announce policies, share updates, assign tasks, or document decisions. Because it is a standard business tool, knowing whether to use memorandum or its plural forms correctly can affect how professional you sound.

Formal vs. Informal Tone

The choice between memorandums and memoranda often signals the formality of your writing.

• Informal / Everyday Business: Use memorandums. This is the anglicized plural and feels natural in internal emails, team chats, or casual notes. Example: "I sent three memorandums to the marketing team this morning."
• Formal / Legal / Academic: Use memoranda. This Latin plural is preferred in legal briefs, court documents, academic papers, and high-level corporate reports. Example: "The legal department filed several memoranda with the court."

Email and Conversation Context

In email subject lines or body text, you will almost always see memorandum (singular) or memo. For plural references in conversation, memorandums is more common and less likely to sound stiff. If you are writing a formal email to a senior executive or a client, memoranda can add a touch of professionalism, but be careful not to sound overly academic in a quick update.

Comparison Table: Memorandum vs. Memorandums vs. Memoranda

Natural Examples

Here are real-world sentences showing how each form is used naturally in business writing.

• Singular (memorandum): "Could you attach the memorandum from last week's board meeting?"
• Plural (memorandums): "We received three memorandums about the new expense policy."
• Plural (memoranda): "The law firm submitted two memoranda of law in support of the motion."
• Short form (memo): "I'll send a quick memo to the team about the deadline change."

Common Mistakes

Even experienced writers sometimes mix up these forms. Here are the most frequent errors and how to avoid them.

• Mistake 1: Using memoranda as a singular noun.
  Incorrect: "This memoranda is important."
  Correct: "This memorandum is important." or "These memoranda are important."
• Mistake 2: Using memorandums in a very formal legal document where memoranda is expected.
  Incorrect: "The court reviewed all memorandums."
  Correct: "The court reviewed all memoranda."
• Mistake 3: Overusing the Latin plural in casual internal emails, which can sound pretentious.
  Incorrect: "I sent two memoranda to the sales team."
  Better: "I sent two memorandums to the sales team."

Better Alternatives and When to Use Them

Sometimes you may want to avoid the confusion altogether. Here are simpler alternatives that work in most business contexts.

• Memo / Memos: The most common and natural choice for internal communication. Use this in emails, Slack messages, or quick updates. Example: "I'll send a memo about the schedule."
• Note / Notes: Good for informal reminders or short messages. Example: "Here are my notes from the meeting."
• Document / Documents: A neutral term when the format is not important. Example: "Please upload the relevant documents."
• Brief / Briefs: Use in legal or formal settings when referring to a written argument. Example: "The attorney prepared two briefs for the case."

When to use it: Stick with memorandum or memo for singular. For plural, choose memorandums in everyday writing and memoranda only when you need a formal or legal tone. If you are unsure, memos is almost always safe and clear.

Mini Practice: Check Your Understanding

Test yourself with these four questions. Answers are below.

1. Which is the correct singular form?
   a) memoranda
   b) memorandum
   c) memorandums
2. Fill in the blank: "The manager sent two _____ to the department heads." (everyday business)
   a) memoranda
   b) memorandums
   c) memorandum
3. True or False: "Memoranda" can be used as a singular noun.
4. Which plural form is more appropriate for a legal document?
   a) memorandums
   b) memoranda
   c) memos

Answers

1. b) memorandum – This is the only correct singular form.
2. b) memorandums – In everyday business, this is the natural plural.
3. False – "Memoranda" is plural. The singular is "memorandum."
4. b) memoranda – Legal documents typically use the Latin plural for a formal tone.

Frequently Asked Questions

1. Is "memorandum" still used in modern business?

Yes, though it is often shortened to memo. The full word memorandum is still common in formal documents, legal writing, and official communications. In day-to-day email, memo is more frequent.

2. Can I use "memo" as a plural?

No, memo is singular. The plural of memo is memos. For example: "I wrote three memos today."

3. Which plural is more correct: memorandums or memoranda?

Both are correct, but they are used in different contexts. Memorandums is the standard English plural and is fine for most business writing. Memoranda is the Latin plural and is preferred in formal, legal, or academic settings. Neither is wrong, but choosing the right one shows attention to tone.

4. What is the plural of "memorandum of understanding"?

The plural is memorandums of understanding or memoranda of understanding. The same rule applies: use memorandums for everyday use and memoranda for formal or legal contexts. Example: "The companies signed two memorandums of understanding."

Final Tip

When in doubt, use memo for singular and memos for plural in most business situations. It is clear, modern, and avoids any confusion about formality. Save memorandum and memoranda for official documents or when you need a more formal tone. For more help with similar questions, visit our Singular or Plural Checks section or explore Confusing Plurals for other tricky word pairs. If you have further questions, feel free to contact us or check our FAQ page.