blue peter

American  

noun

Nautical.

1. a blue flag with a white square in the center, designating the letter P in the International Code of Signals, flown by a vessel in port to indicate its imminent departure.

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blue peter British  

noun

1. a signal flag of blue with a white square at the centre, displayed by a vessel about to leave port

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Etymology

Origin of blue peter

First recorded in 1815–25

Example Sentences

Joan "Biddy" Baxter was in charge of the BBC TV children's programme Blue Peter from 1962.

From BBC

Down-to-earth Greaves started playing darts aged 10 on the board in her brother's bedroom - she even won a Blue Peter badge for her darting exploits - and watched Sherrock's wins in between playing Fortnite.

From BBC

The items in the capsule were selected by two children who won a Blue Peter competition and were intended to represent life in the 1990s.

From BBC

Long-serving Blue Peter editor Biddy Baxter, who turned the children's show into a television institution, has died at the age of 92.

From BBC

But she also gained a reputation as a formidable figure: a tyrant who fell out with presenters and jealously guarded the Blue Peter brand.

From BBC