Origin of why

before 900; Middle English; Old English hwī, hwȳ, instrumental case of hwæt what; cognate with Old Norse hvī

Usage note

See reason.

Definition for why (2 of 2)

why's

[ hwahyz, wahyz ]
/ ʰwaɪz, waɪz /

contraction of why is: Why's dinner so late?

Usage note

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for why

Word Origin for why

Old English hwī; related to Old Norse hvī, Gothic hveileiks what kind of, Latin quī
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