English Reference
noun · verb

memo

n. · v.
US /ˈmɛˌmoʊ/ UK /mˈɛməʊ/ memo UK spelling memo's, memo's

  1. 01 B1 Intermediate

    n.a short written message or report used to share information with people in the same company.

    n.a brief written message or memorandum circulated within an organization to inform staff about a specific matter.

    Simple

    The manager sent a memo to all staff about the new holiday policy.

    In context

    The internal memo outlined the restructuring plan in detail, ensuring that every department head was aware of the upcoming budgetary shifts.

  2. 02 C1 Advanced Technical Computing

    n.a saved result of a calculation that a computer program can reuse later to work faster.

    n.a record of partial results stored in memory to be reused later, avoiding the need for redundant recomputation.

    Simple

    The program uses a memo to store the answer so it doesn't have to calculate it again.

    In context

    By implementing a memo for the recursive function, the developer significantly reduced the execution time of the complex algorithm.

    Usage

    Often used in the context of 'memoization' in functional programming.

    cachestored result
  3. 03 B2 Upper Intermediate Informal

    v.to send someone a short note or message to keep a record of something.

    v.to send a memorandum or brief note to a person, typically for the purpose of official documentation.

    Simple

    I will memo the team about the change in our meeting time.

    In context

    The director decided to memo the board regarding the legal risks before the final vote took place.

Stewart shares internal Monsanto memos from as long ago as 1949 that suggest the firm knew how dangerous PCBs were.

The Guardian· 17 Aug 2026

In a memo seen by the BBC, Air India said it was "important to go further" in its testing.

BBC News· 13 Aug 2026

Clipping of memorandum.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level C1 · Advanced
Frequency Frequent
Updated