Definition of "assume" in English

verb

1. To authenticate by means of belief; to surmise; to suppose to be true, especially without proof.

   • We assume that, as her parents were dentists, she knows quite a bit about dentistry.

2. To take on a position, duty or form.

   • Mr. Jones will assume the position of a lifeguard until a proper replacement is found.

3. To adopt a feigned quality or manner; to claim without right; to arrogate.

   • He assumed an air of indifference.
   • ambition assuming the mask of religion.

4. To receive, adopt (a person).

5. To adopt (an idea or cause).