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Cupid's bow

[boh]
noun
  1. a classical bow Cupid is traditionally pictured as bearing.
  2. a line or shape resembling this, especially the line of the upper lip.

Origin of Cupid's bow

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cupid's bow

Cupid's bow

noun
  1. a shape of the upper lip considered to resemble Cupid's double-curved bow
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