Presume \Pre*sume"\, v. t. [imp. & p. p. Presumed; p. pr. & vb. n. Presuming.]

[F. pr['e]sumer, L. praesumere, praesumptum; prae before + sumere to take. See Assume, Redeem.]

1. To assume or take beforehand; esp., to do or undertake without leave or authority previously obtained.

Dare he presume to scorn us in this manner? --Shak.

Bold deed thou hast presumed, adventurous Eve. --Milton.

2. To take or suppose to be true, or entitled to belief, without examination or proof, or on the strength of probability; to take for granted; to infer; to suppose.

Every man is to be presumed innocent till he is proved to be guilty. --Blackstone.

What rests but that the mortal sentence pass, . . . Which he presumes already vain and void, Because not yet inflicted? --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Presume \Pre*sume"\, v. i.

1. To suppose or assume something to be, or to be true, on grounds deemed valid, though not amounting to proof; to believe by anticipation; to infer; as, we may presume too far.

2. To venture, go, or act, by an assumption of leave or authority not granted; to go beyond what is warranted by the circumstances of the case; to venture beyond license; to take liberties; -- often with on or upon before the ground of confidence.

Do not presume too much upon my love. --Shak.

This man presumes upon his parts. --Locke.

Source: Webster's Revised Unabridged Dictionary (1913)