since

[ sins ]
/ sɪns /

adverb

preposition

continuously from or counting from: It has been warm since noon.
between a past time or event and the present: There have been many changes since the war.

conjunction

Origin of since

1400–50; late Middle English syns, sinnes (adv.) thereupon, afterwards, Middle English sithenes (adv. and conjunction) afterwards, from (the specified time), because, equivalent to sithen after that, since (Old English siththan, orig. sīth thām after that; see sith) + -es -s1

synonym study for since

8. See because.

usage note for since

8. See as1.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for since

since
/ (sɪns) /

preposition

during or throughout the period of time aftersince May it has only rained once

conjunction (subordinating)

(sometimes preceded by ever) continuously from or starting from the time whensince we last met, important things have happened
seeing that; becausesince you have no money, you can't come

adverb

since that timehe left yesterday and I haven't seen him since

Word Origin for since

Old English sīththan, literally: after that; related to Old High German sīd since, Latin sērus late

undefined since

See ago
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

Idioms and Phrases with since

since

see greatest thing since sliced bread.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.