To take for granted; suppose: The study assumes that prices will rise.
To take upon oneself (a duty or obligation): assume responsibility; assume another's debts. To undertake the duties of (an office): assumed the presidency.
To take on (an appearance, role, or form, for example); adopt:"The god assumes a human form"(John Ruskin). To pretend to have; feign: assume an air of authority.
To take over without justification; seize: assume control.
To clothe oneself in; don: The queen assumed a velvet robe.