American English

Definition of brighten verb from the Oxford Advanced American Dictionary



    Verb Forms present simple I / you / we / they brighten
    he / she / it brightens
    past simple brightened
    -ing form brightening
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  1. 1[intransitive, transitive] to become or make something lighter or brighter in color In the distance, the sky was beginning to brighten. brighten something a shampoo to brighten and condition your hair
  2. 2[intransitive, transitive] to become, feel, or look happier; to make someone look happier Her eyes brightened. brighten up He brightened up at their words of encouragement. brighten something (up) A smile brightened her face.
  3. 3[transitive, intransitive] brighten (something) (up) to become or make something become more pleasant or enjoyable; to bring hope A personal letter will usually brighten up a person's day.
  4. 4[transitive] brighten something (up) to make something look more brightly colored and attractive Fresh flowers will brighten up any room in the house.
  5. 5[intransitive] brighten (up) (of the weather) to improve and become brighter According to the forecast, it should brighten up later.
See the Oxford Advanced Learner's Dictionary entry: brighten