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blue peter

noun, Nautical
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.
Origin of blue peter
1815-25 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for blue-peter
Historical Examples
  • The blue-peter was flying at the mast-head, and people hurrying away to say 'good-bye' for the last time.

    Tales Of The Trains Charles James Lever
  • They observe the “blue-peter,” but without knowing aught of its significance.

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

British Dictionary definitions for blue-peter

blue peter

a signal flag of blue with a white square at the centre, displayed by a vessel about to leave port
Word Origin
C19: from the name Peter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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