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supposed

[suh-pohzd, -poh-zid]
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adjective
  1. assumed as true, regardless of fact; hypothetical: a supposed case.
  2. accepted or believed as true, without positive knowledge: the supposed site of an ancient temple.
  3. merely thought to be such; imagined: supposed gains.
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Origin of supposed

First recorded in 1560–70; suppose + -ed2
Related formssup·pos·ed·ly [suh-poh-zid-lee] /səˈpoʊ zɪd li/, adverbnon·sup·posed, adjectiveun·sup·posed, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for unsupposed

supposed

adjective
  1. (prenominal) presumed to be true without certain knowledgehis supposed date of birth
  2. (prenominal) believed to be true on slight grounds; highly doubtfulthe supposed existence of ghosts
  3. (səˈpəʊzd) (postpositive foll by to) expected or obliged (to)I'm supposed to be there at nine
  4. (səˈpəʊzd) (postpositive; used in negative foll by to) expected or obliged not (to)you're not supposed to walk on the grass
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Derived Formssupposedly (səˈpəʊzɪdlɪ), adverb
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 unsupposed

supposed

adj.

"believed or thought to exist," 1580s, past participle adjective from suppose (q.v.); often with the -e- pronounced, to distinguish it from the passive past tense supposed, now common in the sense of "to have a duty or obligation" (1859).

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Online Etymology Dictionary, © 2010 Douglas Harper