Usually means: Assumption or belief without proof.
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We found 28 dictionaries that define the word supposition:

General (25 matching dictionaries)
  1. supposition: Longman Dictionary of Contemporary English
  2. supposition: Merriam-Webster
  3. supposition: Oxford Learner's Dictionaries
  4. supposition: American Heritage Dictionary of the English Language
  5. supposition: Collins English Dictionary
  6. supposition: Vocabulary.com
  7. Supposition, supposition: Wordnik
  8. supposition: Cambridge Advanced Learner's Dictionary
  9. supposition: Wiktionary
  10. supposition: Webster's New World College Dictionary, 4th Ed.
  11. supposition: The Wordsmyth English Dictionary-Thesaurus
  12. supposition: Infoplease Dictionary
  13. supposition: Dictionary.com
  14. supposition: Cambridge Essential American English Dictionary
  15. Supposition: Wikipedia, the Free Encyclopedia
  16. Supposition: Online Plain Text English Dictionary
  17. supposition: Webster's Revised Unabridged, 1913 Edition
  18. supposition: Rhymezone
  19. Supposition, supposition (f): AllWords.com Multi-Lingual Dictionary
  20. supposition: Webster's 1828 Dictionary
  21. supposition: FreeDictionary.org
  22. supposition: Mnemonic Dictionary
  23. supposition: TheFreeDictionary.com

Art (1 matching dictionary)
  1. Literary Criticism (No longer online)

Business (1 matching dictionary)
  1. supposition: Legal dictionary

Computing (1 matching dictionary)
  1. supposition: Encyclopedia

(Note: See suppositional as well.)

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Definitions from Wiktionary (
)
American English Definition British English Definition
▸ noun:  Something that is supposed; an assumption made to account for known facts, conjecture.
▸ noun:  The act or an instance of supposing.

Similar:
supposal, conjecture, assumption, surmise, hypothesis, guess, speculation, theory, suspicion, guesswork, more...

Opposite:
fact, reality, truth

Types:
hypothesis, theory, law, postulate, conjecture, speculation, premise, more...

Phrases:
supposition of fact, supposition theory, more...

Adjectives:
such, latter, first, mere, reasonable, former, last, natural, false, probable, contrary



▸ Words similar to supposition

▸ Usage examples for supposition

▸ Idioms related to supposition

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▸ Popular adjectives describing supposition

▸ Words that often appear near supposition

▸ Rhymes of supposition

▸ Invented words related to supposition

Similar:
supposal, conjecture, assumption, surmise, hypothesis, guess, speculation, theory, suspicion, guesswork, more...

Opposite:
fact, reality, truth

Types:
hypothesis, theory, law, postulate, conjecture, speculation, premise, more...

Phrases:
supposition of fact, supposition theory, more...

Adjectives:
such, latter, first, mere, reasonable, former, last, natural, false, probable, contrary



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