HAPPY definition: 1. feeling, showing, or causing pleasure or satisfaction: 2. (used in greetings for special…. Learn more. The meaning of HAPPY is enjoying or characterized by well-being and contentment. How to use happy in a sentence. Synonym Discussion of Happy. Definition of happy adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. Define happy. happy synonyms, happy pronunciation, happy translation, English dictionary definition of happy. adj. hap·pi·er , hap·pi·est 1. Enjoying, showing, or marked by pleasure, satisfaction, or joy. Someone who is happy has feelings of pleasure, usually because something nice has happened or because they feel satisfied with their life. Marina was a confident, happy child. I'm just happy to be back running. Her face relaxed into a happy smile. delighted, pleased, or glad, as over a particular thing: to be happy to see a person. characterized by or indicative of pleasure, contentment, or joy: a happy mood; a happy frame of mind. HAPPY definition: delighted, pleased, or glad, as over a particular thing. See examples of happy used in a sentence. Dec 31, 2025 · happy (comparative happier or more happy, superlative happiest or most happy) Having a feeling arising from a consciousness of well-being or of enjoyment; enjoying good of any kind, such as comfort, peace, or tranquillity; blissful, contented, joyous. synonyms, antonyms quotations HAPPY meaning: 1 : feeling pleasure and enjoyment because of your life, situation, etc.; 2 : showing or causing feelings of pleasure and enjoyment Happy is a feeling of joy, pleasure, or good fortune — exactly how you'd feel if you learned that you won the lottery or got accepted into your number one choice of colleges.