happy adjective definition in Happiness topic from the Oxford Advanced Learner's Dictionary

happy

 adjective: Happiness topic
1 feeling or showing pleasure; pleased a happy smile/face You don't look very happy today. happy to do something We are happy to announce the engagement of our daughter. happy for somebody I'm very happy for you. happy (that)… I’m happy (that) you could come. 2 happy to do something (formal) willing or pleased to do something I'm happy to leave it till tomorrow. He will be more than happy to come with us.