To separate or unfasten; disconnect: detach a check from the checkbook; detach burs from one's coat.
To remove from association or union with something: detach a calf from its mother; detached herself from the group.
To send (troops or ships, for example) on a special mission.
[French détacher, from Old French destachier : des-, de- + attachier, to attach; see attach.] de·tach'a·bil'i·ty n., de·tach'a·ble adj., de·tach'a·bly adv.