IFF
Military.
Identification, Friend or Foe: a system of transmitters and transponders that uses coded signals to distinguish between friendly and hostile aircraft.
Dictionary.com Unabridged
iff
Mathematics.
if and only if.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source
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Link To IFF
00:10
Iff
is always a great word to know.
So is slumgullion. Does it mean:
| a scrap or morsel of food left at a meal. |
| a stew of meat, vegetables, potatoes, etc. |
Collins
World English Dictionary
iff (ɪf) ![[Click for IPA pronunciation guide]](http://static.sfdict.com/dictstatic/g/d/dictionary_questionbutton_default.gif) | |
| —conj | |
| logic a shortened form of if and only if: it indicates that the two sentences so connected are necessary and sufficient conditions for one another. Usually iff is used for equivalence in the metalanguage, rather than as the biconditional in the object language | |
| IFF | |
| —abbreviation for | |
| Identification, Friend or Foe: a system using radar transmissions to which equipment carried by friendly forces automatically responds with a precoded signal | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
FOLDOC
iff definition
mathematics, logicif and only if, i.e. necessary and sufficient. For example, two figures are congruent iff one can be placed over the other so that they coincide.
(2002-12-28)
American Heritage
Abbreviations & Acronyms
| iff if and only if |
| IFF identification, friend or foe |
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Example sentences from the web
A person is a bachelor iff that person is a marriageable man who has never married.
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