punc·tu·al / ˈpəngkchoōəl/ • adj. happening or doing something at the agreed or proper time; on time: he's the sort of man who's always punctual. ∎ Gram. denoting or relating to an action that takes place at a particular point in time. Contrasted with durative.DERIVATIVES: punc·tu·al·i·ty / ˌpəngkchoōˈalitē/ n.punc·tu·al·ly adv.