Phrase guide

mum's the word

phrase · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

phrase

Meaning 1

Indicates that something is a secret and not to be divulged.

Definition source: English Wiktionary via Wiktextract

Usage: idiomatic

Examples

  • She doesn't know anything about it yet, so mum's the word, OK?

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

From mum (“silence”). Recorded since 1704.

Across languages

Translations

18 source translations are retained for this English entry.

  • Arabic: السر في بئر — indicates that something is a secret
  • Catalan: muts i a la gàbia — indicates that something is a secret
  • Chinese Mandarin: 保密 (bǎomì) — indicates that something is a secret
  • Dutch: mondje dicht — indicates that something is a secret
  • Estonian: ära kellelegi räägi — indicates that something is a secret
  • French: motus et bouche cousue — indicates that something is a secret
  • German: Behalte es für dich — indicates that something is a secret
  • German: pst — indicates that something is a secret
  • German: pscht — indicates that something is a secret
  • Italian: acqua in bocca — indicates that something is a secret
  • Persian: شتر دیدی ندیدی (šotor didi nadidi) — indicates that something is a secret
  • Polish: ani mru-mru — indicates that something is a secret
  • Portuguese: bico calado — indicates that something is a secret
  • Portuguese: boca de siri — indicates that something is a secret
  • Russian: об э́том ни гугу́ (ob étom ni gugú) — indicates that something is a secret
  • Russian: об э́том молчо́к (ob étom molčók) — indicates that something is a secret
  • Spanish: chitón — indicates that something is a secret
  • Welsh: taw piau hi — indicates that something is a secret