1. 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. Constantly at work; diligent; active.
  3. Crowded with business or activities; -- said of places and times; as, a busy street.
  4. Officious; meddling; foolish active.
  5. Careful; anxious.

v. t.

  1. To make or keep busy; to employ; to engage or keep engaged; to occupy; as, to busy one's self with books.