Etymology
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presume (v.)

late 14c., presumen, "to take upon oneself, to take liberty," also "to take for granted, believe or accept upon probable evidence, presuppose," especially overconfidently, from Old French presumer (12c.) and directly from Latin praesumere "anticipate," in Late Latin, "assume," from prae "before" (see pre-) + sumere "to take, obtain, buy," from sus‑, variant of sub‑ "up from under" + emere "to take" (from PIE root *em- "to take, distribute").

To presume is to base a tentative or provisional opinion on such knowledge as one has, to be held until it is modified or overthrown by further information. [Century Dictionary]

The intransitive sense of "to venture beyond the limits of ordinary license or propriety" and that of "to press forward presumptuously" are from early 15c. Related: Presumed; presumedly; presuming; presumingly.

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Definitions of presume

presume (v.)
take to be the case or to be true; accept without verification or proof;
Synonyms: assume / take for granted
presume (v.)
take upon oneself; act presumptuously, without permission;
Synonyms: make bold / dare
presume (v.)
constitute reasonable evidence for;
A restaurant bill presumes the consumption of food
presume (v.)
take liberties or act with too much confidence;
From wordnet.princeton.edu