›feeling, showing, or causing pleasure or satisfaction: To tell the truth, I’ve never been happier in my whole life.People want movies to have happy endings.[+ (that) clause]I’m happy (that) everything is working out for you.I’ve been very happy with (= satisfied with) the education that my boys have gotten through scouting.›Happy is used as a polite way to express your willingness to do something: [+ to infinitive]I’m driving that way and I’d be happy to drop you off at your home.[+ to infinitive]It was no trouble at all – I was happy to be of help.›Happy is also used in greetings for special occasions, expressing good wishes: Happy birthday!Happy New Year