1suppose to be the case, without proof:topics which assume detailed knowledge of local events [with clause]:it is reasonable to assume that such changes have significant social effects [with object and infinitive]:they were assumed to be foreign
2take or begin to have (power or responsibility):he assumed full responsibility for all organizational work
seize (power or control):the rebels assumed control of the capital
3begin to have (a specified quality, appearance, or extent):militant activity had assumed epidemic proportions
take on or adopt (a manner or identity), sometimes falsely:Oliver assumed an expression of penitenceshe puts on a disguise, assumes a different persona, and cruises the squalid bars on the bad side of town (as adjective assumed)a man living under an assumed name
