[ uh-soom ]
/ 蓹藞sum /
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See synonyms for: assume / assumed / assumes / assuming on Thesaurus.com

verb (used with object), as路sumed, as路sum路ing.
verb (used without object), as路sumed, as路sum路ing.
to take something for granted; presume.
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Origin of assume

First recorded in 1400鈥50; late Middle English (from Anglo-French assumer ), from Latin ass奴mere 鈥渢o take to, adopt,鈥 equivalent to as- 鈥渢oward鈥 + s奴mere 鈥渢o take up鈥; see as-, consume

synonym study for assume

6. See pretend.


as路sum路er, nouno路ver路as路sume, verb (used with object), o路ver路as路sumed, o路ver路as路sum路ing.pre路as路sume, verb (used with object), pre路as路sumed, pre路as路sum路ing.re路as路sume, verb (used with object), re路as路sumed, re路as路sum路ing.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, 漏 Random House, Inc. 2023


What's the difference between聽assume聽and聽presume?

Assume and presume have very similar meanings鈥攖hey both mean to suppose that something is true without being able to confirm it. Assume, however, usually implies that the conclusion reached by the person doing the assuming is not based on much. Presume, on the other hand, often implies that the conclusion is based on something a bit stronger, such as some evidence or past situations in which the same thing happened.

For example, you might presume that someone will be attending a meeting because they always attend and you have no reason to think they won鈥檛 be there. The word assume could also be used in this scenario, but it鈥檚 most likely to be used in situations in which there was less of a reason to have come to a certain conclusion. For example, you might assume something about someone you鈥檝e just met based only on how they look (which is never a good idea).

A good way to remember this difference in how the two words are used is that the prefix pre- in presume means 鈥渂efore鈥濃攚hen you presume things, you鈥檙e often basing that presumption on something that has happened before. As for assume, well, we鈥檒l just assume you know a good way of remembering how it鈥檚 used.

Assume and presume also have a few meanings that don鈥檛 overlap. Assume can mean to take on, adopt, or be endowed with something, as in I don鈥檛 want to assume any new responsibilities. Presume can mean to undertake or do something without permission or justification, as in I don鈥檛 presume to speak for the entire class.

Here are examples of assume and presume used correctly in a sentence.

Example: I assumed you knew what you were doing when you volunteered to bake the cake, but apparently I shouldn鈥檛 have.

Example: I presumed, based on your resume, that you knew how to work with this software.

Want to learn more? Read the full breakdown of the difference between assume and presume.

Quiz yourself on聽assume聽vs.聽presume!

Is assume or presume the better choice in the following sentence?

We don鈥檛 know anything, so we shouldn鈥檛 _____ anything.

How to use assume in a sentence

British Dictionary definitions for assume

/ (蓹藞sju藧m) /

verb (tr)
(may take a clause as object) to take for granted; accept without proof; supposeto assume that someone is sane
to take upon oneself; undertake or take on or over (a position, responsibility, etc)to assume office
to pretend to; feignhe assumed indifference, although the news affected him deeply
to take or put on; adoptthe problem assumed gigantic proportions
to appropriate or usurp (power, control, etc); arrogatethe revolutionaries assumed control of the city
Christianity (of God) to take up (the soul of a believer) into heaven

Derived forms of assume

assumable, adjectiveassumer, noun

Word Origin for assume

C15: from Latin ass奴mere to take up, from s奴mere to take up, from sub- + emere to take
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 漏 William Collins Sons & Co. Ltd. 1979, 1986 漏 HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012