[ sis ]
/ sɪs /

noun Informal.

Origin of sis

1825–35, Americanism; shortened form; compare Dutch zus for zuster sister

Definition for sis (2 of 2)


a suffix appearing in loanwords from Greek, where it was used to form from verbs abstract nouns of action, process, state, condition, etc.: thesis; aphesis.

Origin of -sis

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

Examples from the Web for sis

British Dictionary definitions for sis (1 of 3)

/ (sɪs) /


informal short for sister

British Dictionary definitions for sis (2 of 3)



/ (sɪs, siːs) /


Southern African informal an exclamation of disgust

Word Origin for sis

Afrikaans, possibly from Khoi

British Dictionary definitions for sis (3 of 3)


abbreviation for

Also called: MI6 (in Britain) Secret Intelligence Service
(in New Zealand) Security Intelligence Service
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