Simple Definition of assume
: to think that something is true or probably true without knowing that it is true
: to begin (a role, duty, etc.) as a job or responsibility
: to take or begin to have (power, control, etc.) in a job or situation
Full Definition of assume
1 a : to take up or in : receive b : to take into partnership, employment, or use
4 : to pretend to have or be : feign <assumed an air of confidence in spite of her dismay>
5 : to take as granted or true : suppose <I assume he'll be there>
6 : to take over (the debts of another) as one's own
assumabilityplay \-ˌsü-mə-ˈbi-lə-tē\ noun
assumableplay \-ˈsü-mə-bəl\ adjective
assumablyplay \-blē\ adverb
Examples of assume in a sentence
I assumed he was coming, so I was surprised when he didn't show up.
She assumed from his expression that he was confused.
We'll be arriving around noon. That's assuming that our flight is on time.
The king assumed the throne when he was very young.
Under certain conditions, the chemical will assume the appearance of ice.
Origin and Etymology of assume
Middle English, from Latin assumere, from ad- + sumere to take — more at consume
First Known Use: 15th century
Synonym Discussion of assume
ASSUME Defined for Kids
Definition of assume for Students
1 : to begin to take on or perform <assume responsibility> <assumed the presidency>
2 : to take or begin to have <The problem assumes greater importance now.>
3 : to pretend to have or be <We both assumed an air of weary worldliness … — Richard Peck, A Long Way From Chicago>
4 : to accept as true <I assume you're right.>
Legal Definition of assume
1 : to voluntarily take upon oneself <assume a risk>
2 : to take over (the debts or obligations of another) as one's own <assume a mortgage>
Seen and Heard
What made you want to look up assume? Please tell us where you read or heard it (including the quote, if possible).