The adj happy has 4 senses (first 2 from tagged texts)
1. (37) happy -- (enjoying or showing or marked by joy or pleasure or good fortune; "a happy smile"; "spent many happy days on the beach"; "a happy marriage")
2. (2) felicitous, happy -- (marked by good fortune; "a felicitous life"; "a happy outcome")
3. glad, happy -- (eagerly disposed to act or to be of service; "glad to help")
4. happy, well-chosen -- (well expressed and to the point; "a happy turn of phrase"; "a few well-chosen words")