blue peter

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.

blue peter

noun

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

Word History and Origins

Origin of blue peter¹

First recorded in 1815–25

Word History and Origins

Origin of blue peter¹

C19: from the name Peter

Example Sentences

The Blue Peter was at the fore, and her deck was crowded with excited, jubilant Venezuelans.

From Project Gutenberg

In some places it is known as a crow duck, but the proper local name here is "blue-peter."

From Project Gutenberg

The reporter knew that this was the "Blue Peter," flown in token that the steamer was about to sail.

From Project Gutenberg

“Blue Peter” had been flying for some time, and a gun was fired to hurry off those on shore.

From Project Gutenberg

They observe the “Blue-Peter,” but without knowing aught of its significance.

From Project Gutenberg