noun Informal.

Nearby words

  1. sirrah,
  2. sirree,
  3. sirup,
  4. sirupy,
  5. sirvente,
  6. sis-boom-bah,
  7. sisal,
  8. sisal hemp,
  9. siscowet,
  10. sisera

Origin of sis

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


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




informal short for sister


Southern African informal an exclamation of disgust

Word Origin for sis

Afrikaans, possibly from Khoi


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

Word Origin and History for sis
Online Etymology Dictionary, © 2010 Douglas Harper