Definition of smile verb from the Oxford Advanced American Dictionary

      

    smile

     verb
    verb
    NAmE//smaɪl//
     
    Verb Forms present simple I / you / we / they smile
     
    he / she / it smiles
     
    past simple smiled
     
    -ing form smiling
     
     
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  1. 1[intransitive] to make a smile appear on your face to smile sweetly/faintly/broadly, etc. He smiled with relief. He never seems to smile. He smiled to think how naive he used to be. smile at somebody/something She smiled at him and he smiled back. I had to smile at (= was amused by) his optimism. Her eyes smiled up at him.
  2. 2[transitive] to say or express something with a smile smile something She smiled her thanks. + speech “Perfect,” he smiled.
  3. 3[transitive, no passive] smile something to give a smile of a particular type to smile a small smile She smiled a smile of dry amusement.
  4. Idioms
    smile/grin/beam from ear to ear
     
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    to be smiling, etc. a lot because you are very pleased about something
    Phrasal Verbssmile on somebody/something
See the Oxford Advanced Learner's Dictionary entry: smile