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[suhp-uh-zish-uh n] /ˌsʌp əˈzɪʃ ən/
the act of supposing.
something that is supposed; assumption; hypothesis.
late Middle English
1400-50; late Middle English < Latin suppositiōn- (stem of suppositiō) substitution (E meaning by association with suppose), equivalent to supposit(us) (past participle of suppōnere to substitute) + -iōn- -ion. See sup-, position
Related forms
suppositional, adjective
suppositionally, adverb
nonsuppositional, adjective
nonsuppositionally, adverb
unsuppositional, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for suppositions
  • All these suppositions are consistent and conceivable.
  • But these are two contradictory suppositions in the state of nature, to be robust and dependent.
  • In other words, he was convicted on the basis of suppositions about crimes he might commit in the future.
  • The suppositions and postulations of ethical dilemma in question should logically be addressed using these same chess strategies.
  • It seems that an ever increasing band of people lack the perspective to know where his or her suppositions have authority.
  • There are various suppositions required to make this work.
  • He makes a flowing stream out of historical facts, scholarly opinions, and his own suppositions.
  • Schwartz's method has been to pile flagrant distortions on unfounded suppositions on immaterial details.
  • All the suppositions in the paragraph above may be true.
  • The trouble with this idea is that you need to build suppositions upon suppositions.
British Dictionary definitions for suppositions


the act of supposing
a fact, theory, etc, that is supposed
Derived Forms
suppositional, adjective
suppositionally, adverb
suppositionless, adjective
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
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Word Origin and History for suppositions



early 15c., a term in logic, from Late Latin suppositionem (nominative suppositio) "assumption, hypothesis," noun of action from past participle stem of supponere (see suppose); influenced by Greek hypothesis.

Online Etymology Dictionary, © 2010 Douglas Harper
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