ETYM Old Eng. assumpcioun a taking up into heaven, Latin assumptio a taking, from assumere: cf. French assomption. Related to Assume.
1. A hypothesis that is taken for granted; SYN. supposition.
2. The act of taking possession of or power over something; SYN. laying claim.

1. Interpretation of omens; supposition
2. Inference from defective or presumptive evidence; a conclusion deduced by surmise or guesswork; a proposition (as in mathematics) before it has been proved or disproved

(Irregular plural: guesses).
1. A message expressing an opinion based on incomplete evidence; SYN. conjecture, supposition, surmise, speculation, hypothesis.
2. An estimate based on little or no information; SYN. guesswork, guessing, shot, dead reckoning.

Work performed or results obtained by guess; conjecture. SYN. guess-work

ETYM Latin praesumptio: cf. French présomption, Old Fren. also presumpcion. Related to Presume.
Audacious (even arrogant) behavior that one has no right to; SYN. presumptuousness, assumption.