an Old World titmouse, Parus caeruleus, having a cobalt-blue crown.
Origin of blue tit
First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a common European tit, Parus caeruleus, having a blue crown, wings, and tail, yellow underparts, and a black and grey head
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