hap·py / ˈhapē/ • adj. (-pi·er, -pi·est) 1. feeling or showing pleasure or contentment: Melissa came in looking happy and excited | we're just happy that he's still alive | they are happy to see me doing well. ∎ (happy about) having a sense of confidence in or satisfaction with (a person, arrangement, or situation): I was never very happy about the explanation I can't say they looked too happy about it, but a deal's a deal. ∎ (happy with) satisfied with the quality or standard of: I'm happy with his performance. ∎ willing to do something: we will be happy to advise you. ∎ (of an event or situation) characterized by happiness: we had a very happy, relaxed time. ∎ used in greetings: happy birthday. ∎ fortunate and convenient: he had the happy knack of making people like him.2. [in comb.] inf. inclined to use a specified thing excessively or at random: our litigation-happy society.PHRASES: (as) happy as a clam (at high tide) extremely happy.happy hunting ground a place where success or enjoyment is obtained.DERIVATIVES: hap·pi·ness n.