v. pre·sumed, pre·sum·ing, pre·sumes
1. To take for granted as being true in the absence of proof to the contrary: "I presume you're tired after the long ride" (Edith Wharton).
2. To constitute reasonable evidence for assuming; appear to prove: A signed hotel bill presumes occupancy of a room.
3. To venture without authority or permission; dare: He presumed to invite himself to dinner.
1. To take for granted that something is true or factual; make a supposition.
2. To act presumptuously or take unwarranted advantage of something: Don't presume on their hospitality.
[Middle English presumen, from Old French presumer, from Late Latin praesūmere, from Latin, to anticipate : prae-, pre- + sūmere, to take; see em- in the Appendix of Indo-European roots.]
pre·sumed·ly (-zmĭd-lē) adv.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.