bus·y / ˈbizē/ • adj. (bus·i·er, bus·i·est) having a great deal to do: he had been too busy to enjoy himself. ∎ occupied with or concentrating on a particular activity or object of attention: the team members are busy raising money. ∎ (of a place) full of activity. ∎ excessively detailed or decorated; fussy: they papered the bedroom with a busy pattern of satyrs and dryads. ∎ (of a telephone line) in use.• v. (bus·ies, bus·ied) [tr.] (busy oneself) keep occupied: she busied herself with her new home.DERIVATIVES: bus·i·ly / -lē/ adv.bus·y·ness n.