(1):
(a.) Engaged in some business; hard at work (either habitually or only for the time being); occupied with serious affairs; not idle nor at leisure; as, a busy merchant.
(2):
(a.) Constantly at work; diligent; active.
(3):
(a.) Careful; anxious.
(4):
(a.) Crowded with business or activities; - said of places and times; as, a busy street.
(5):
(v. t.) To make or keep busy; to employ; to engage or keep engaged; to occupy; as, to busy one's self with books.
(6):
(a.) Officious; meddling; foolish active.