Adjective

1. Favored by hap, luck, or fortune; lucky; fortunate; successful; prosperous; satisfying desire.

   Chymists have been more happy in finding experiments than the causes of them - Boyle

2. Experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.

   Happy is that people, whose God is the Lord - Psalm 144:15

   The learned is happy Nature to explore, The fool is happy that he knows no more - Alexander Pope

3. Dexterous; ready; apt; felicitous.

   One gentleman is happy at a reply, another excels in a rejoinder - Jonathan Swift

4. Content (to do something); having no objection (to something).

   Are you happy to pay me back by the end of the week?

Usage notes