'twas

[ twuhz, twoz; unstressed twuh z ]
/ twʌz, twɒz; unstressed twəz /

contraction of it was.

Usage note

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

British Dictionary definitions for 'twas

'twas

/ (twɒz, unstressed twəz) poetic, or dialect /

contraction of

it was
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