birr 1 (bûr)n.1. A whirring sound.2. Strong forward momentum; driving force.intr.v. birred, birr·ing, birrs To make a whirring sound.[Middle English bir, favorable wind, from Old Norse byrr; see bher- in Indo-European roots.]birr 2 (bîr)n. pl. birr or birrs See Table at currency.[Amharic b?rr, silver, silver taler bearing the portrait of Holy Roman Empress Maria Theresa (used as currency throughout East Africa and the Indian Ocean region until recent times), birr; see brr in Semitic roots.]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.birr (b??) vbto make or cause to make a whirring soundn1. a whirring sound2. force, as of wind3. vigour; energy[Old English byre storm, related to Old Norse byrr favourable wind]birr (b??) n (Currencies) the standard monetary unit of Ethiopia, divided into 100 cents[C20: from Amharic]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014birr (b??r) n., pl. birr. the basic monetary unit of Ethiopia. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.birrPast participle: birredGerund: birringImperativePresentPreteritePresent ContinuousPresent PerfectPast ContinuousPast PerfectFutureFuture PerfectFuture ContinuousPresent Perfect ContinuousFuture Perfect ContinuousPast Perfect ContinuousConditionalPast ConditionalImperativebirrbirrPresentI birryou birrhe/she/it birrswe birryou birrthey birrPreteriteI birredyou birredhe/she/it birredwe birredyou birredthey birredPresent ContinuousI am birringyou are birringhe/she/it is birringwe are birringyou are birringthey are birringPresent PerfectI have birredyou have birredhe/she/it has birredwe have birredyou have birredthey have birredPast ContinuousI was birringyou were birringhe/she/it was birringwe were birringyou were birringthey were birringPast PerfectI had birredyou had birredhe/she/it had birredwe had birredyou had birredthey had birredFutureI will birryou will birrhe/she/it will birrwe will birryou will birrthey will birrFuture PerfectI will have birredyou will have birredhe/she/it will have birredwe will have birredyou will have birredthey will have birredFuture ContinuousI will be birringyou will be birringhe/she/it will be birringwe will be birringyou will be birringthey will be birringPresent Perfect ContinuousI have been birringyou have been birringhe/she/it has been birringwe have been birringyou have been birringthey have been birringFuture Perfect ContinuousI will have been birringyou will have been birringhe/she/it will have been birringwe will have been birringyou will have been birringthey will have been birringPast Perfect ContinuousI had been birringyou had been birringhe/she/it had been birringwe had been birringyou had been birringthey had been birringConditionalI would birryou would birrhe/she/it would birrwe would birryou would birrthey would birrPast ConditionalI would have birredyou would have birredhe/she/it would have birredwe would have birredyou would have birredthey would have birredCollins English Verb Tables © HarperCollins Publishers 2011