To take upon oneself: assume responsibility; assume another's debts.
To undertake the duties of (an office): assumed the presidency.
To take on; adopt: "The god assumes a human form"(John Ruskin).
To put on; don: The queen assumed a velvet robe.
To affect the appearance or possession of; feign.
To take for granted; suppose: assumed that prices would rise. See Synonyms at presume.
To take over without justification; seize: assume control.
To take up or receive into heaven.
[Middle English assumen, from Latin assūmere : ad-, ad- + sūmere, to take; see em- in Indo-European roots.] as·sum'a·bil'i·ty n., as·sum'a·ble adj., as·sum'a·bly adv., as·sum'er n.