assume

[uh-soom]

verb (used with object)

assumed, assuming 

1. to take for granted or without proof.

   to assume that everyone wants peace.

   Synonyms: posit, postulate, presuppose, suppose

2. to take upon oneself; undertake.

   to assume an obligation.

3. to take over the duties or responsibilities of.

   to assume the office of treasurer.

4. to take on (a particular character, quality, mode of life, etc.); adopt.

   He assumed the style of an aggressive go-getter.

5. to take on; be invested or endowed with.

   The situation assumed a threatening character.

6. to pretend to have or be; feign.

   to assume a humble manner.

7. to appropriate or arrogate; seize; usurp.

   to assume a right to oneself; to assume control.

8. to take upon oneself (the debts or obligations of another).

9. Archaic.,  to take into relation or association; adopt.

verb (used without object)

assumed, assuming 

1. to take something for granted; presume.

assume

/ əˈsjuːm /

verb

1. (may take a clause as object) to take for granted; accept without proof; suppose

   to assume that someone is sane

2. to take upon oneself; undertake or take on or over (a position, responsibility, etc)

   to assume office

3. to pretend to; feign

   he assumed indifference, although the news affected him deeply

4. to take or put on; adopt

   the problem assumed gigantic proportions

5. to appropriate or usurp (power, control, etc); arrogate

   the revolutionaries assumed control of the city

6. Christianity (of God) to take up (the soul of a believer) into heaven

Other Word Forms

• assumer noun
• assumable adjective
• overassume verb (used with object)
• preassume verb (used with object)
• reassume verb (used with object)

Word History and Origins

Origin of assume¹

First recorded in 1400–50; late Middle English (from Anglo-French assumer ), from Latin assūmere “to take to, adopt,” equivalent to as- “toward” + sūmere “to take up”; as-, consume

Word History and Origins

Origin of assume¹

C15: from Latin assūmere to take up, from sūmere to take up, from _sub- + emere to take

Synonym Study

See pretend.

Example Sentences

You could assume that Sterling looked to Chelsea to identify solutions to the problem.

From BBC

They’re just assuming there’s a lot of bad stuff about him the FBI turned up.

From Salon

The jump means coffee drinkers might end up paying up to 7% more per cup, assuming cafes absorb some of the extra cost, he estimated.

From BBC

In April 2025 she had further blood tests as part of her three month review and was told that she wasn't diabetic, which she assumed was because she had been on Metformin.

From BBC

Before, when I had written something like that, I assumed that people are going to understand how those kinds of verbal challenges are fueled by the racism of the time.

From Los Angeles Times

Related Words

• accept 
• conclude 
• consider 
• estimate 
• expect 
• guess 
• infer 
• presume 
• speculate 
• suspect 
• think 
• understand 

When To Use

What's the difference between assume and presume?

Assume and presume have very similar meanings—they 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’t be there. The word assume could also be used in this scenario, but it’s 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’ve 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 “before”—when you presume things, you’re often basing that presumption on something that has happened before. As for assume, well, we’ll just assume you know a good way of remembering how it’s used.Assume and presume also have a few meanings that don’t overlap. Assume can mean to take on, adopt, or be endowed with something, as in I don’t want to assume any new responsibilities. Presume can mean to undertake or do something without permission or justification, as in I don’t 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’t 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.