1 feeling or showing pleasure or contentment: Melissa came in looking happy and excited | [with clause] : we’re just happy that he’s still alive | [with infinitive] : they are happy to see me doing well.
• (happy about) having a sense of trust and confidence in (a person, arrangement, or situation): he was not happy about the proposals.
• (happy with) satisfied with the quality or standard of: I’m happy ith his performance. • [with infinitive] willing to do something: we will be happy to advise you.
• [attributive] used in greetings: happy Christmas.