Wren (r?n)n. A member of the British Women’s Royal Naval Service.wren (r?n)n.1. Any of various small brownish songbirds of the family Troglodytidae, having rounded wings, a slender bill, and a short, often erect tail. All species but one, which is Eurasian, are found only in the Americas.2. Any of various similar unrelated songbirds.[Middle English wrenne, from Old English wrenna.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.wren (r?n) n1. (Animals) any small brown passerine songbird of the chiefly American family Troglodytidae, esp Troglodytes troglodytes (wren in Britain, winter wren in the US and Canada). They have a slender bill and feed on insects2. (Animals) any of various similar birds of the families Muscicapidae (Australian warblers), Xenicidae (New Zealand wrens), etc[Old English wrenna, werna; related to Old High German wrendo, rentilo, Old Norse rindill]Wren (r?n) n (Military) history informal (in Britain and certain other nations) a member of the former Women’s Royal Naval Service[C20: from the abbreviation WRNS]Wren (r?n) n (Biography) Sir Christopher. 1632?1723, English architect. He designed St Paul’s Cathedral and over 50 other London churches after the Great Fire as well as many secular buildingsCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014wren (r?n) n. 1. any of various small, active songbirds of the family Troglodytidae, with streaked or spotted brown-gray plumage, a slender bill, and, in many species, elaborate vocal repertoires: found only in the New World with the exception of Troglodytes troglodytes, of North America, Eurasia, and NW Africa. 2. any of various similar, unrelated songbirds, as Australasian flycatchers of the subfamily Malurinae and New Zealand birds of the family Acanthisittidae. [before 900; Middle English wrenn(e), Old English wrenna, obscurely akin to Old High German wrendilo, Old Norse rindill] Wren (r?n) n. Sir Christopher, 1632?1723, English architect. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.