Phrase guide

blue peter

noun · verb · 7 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

noun

Meaning 1

A blue signal flag with a white rectangle in the centre, signifying "P". When flown alone, indicates that a ship is ready to sail, requiring all crew members and passengers to return on board.

Definition source: English Wiktionary via Wiktextract

Topics: nautical, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

In whist, a play that calls for trumps by throwing away a higher card of a suit while holding a lower one.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

Topics: card-games, games

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

American coot, mudhen (Fulica americana)

Definition source: English Wiktionary via Wiktextract

Usage: US

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

American purple gallinule (Porphyrio martinicus)

Definition source: English Wiktionary via Wiktextract

Usage: US

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

Alternative letter-case form of blue peter.

Definition source: English Wiktionary via Wiktextract

Usage: alt-of

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

verb

Meaning 6

In whist, to play a blue peter.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

Topics: card-games, games

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

a blue flag with a white square in the center indicates that the vessel is ready to sail

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: code flag, nautical signal flag

History

Etymology

The flag, serving as a signal of recall for departure, was used by the British Navy from 1777, and the name “blue peter” had become common by the end of the 18th century. An all-blue flag had earlier seen use for the same purpose by the Dutch East India Company. While “blue” obviously refers to the dominant colour of the flag, the origin of the second part of the term, “peter”, is unknown. Often said to be a corruption of “blue repeater”, there is actually no signal flag that goes by that designation. The use of the flag to spell the letter “P” dates from 1857 and so cannot have played a role in the origin of the term. The whist play, introduced by Lord Henry Bentinck, was named by him after the flag.

From blue + Peter, likely in reference to the color of the birds. Attested from the 18th century.

See blue peter.

Across languages

Translations

1 source translations are retained for this English entry.

  • French: pavillon de partance — signal flag