happy Definition in Cambridge American English Dictionary
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Definition of "happy" - American English Dictionary

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happyadjective

 us   /ˈhæp·i/

happy adjective (PLEASED)

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

happy adjective (LUCKY)

lucky: By a happy coincidence, we found ourselves on the same flight. Note: said about a condition or situation
(Definition of happy from the Cambridge Academic Content Dictionary © Cambridge University Press)
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