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American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
informal short for sister
sis(sɪs; siːs) or
informal South African an exclamation of disgust
[Afrikaans, possibly from Khoi]
1. (Government, Politics & Diplomacy) Also called: MI6 (in Britain) Secret Intelligence Service
2. (Government, Politics & Diplomacy) (in New Zealand) Security Intelligence Service
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
[1825–35, Amer.; shortened form]
a suffix appearing in loanwords from Greek, where it was used to form from verbs abstract nouns of action, process, state, condition, etc.: aphesis; thesis.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||sis - a female person who has the same parents as another person; "my sister married a musician"|
big sister - an older sister
female sibling - a person's sister
little sister - a younger sister
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