Meaning of “grin” in the English Dictionary

"grin" in British English

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grinnoun [ C ]

uk /ɡrɪn/ us /ɡrɪn/

C2 a wide smile:

I assumed things had gone well for him because he had a big grin on his face.
a broad/sheepish grin

More examples

  • That child's got such a cheeky grin.
  • I love his mischievous grin, don't you?
  • The baby turned and gave me a toothy grin.
  • At 70, he still retains his impish grin.
  • Amy took a crayon and drew a round face with two round eyes and a big grin.

grinverb [ I ]

uk /ɡrɪn/ us /ɡrɪn/ -nn-

C2 to smile a wide smile:

He grinned at me from the doorway.
What are you grinning about?

More examples

  • The class photograph showed a strange bunch of grinning children.
  • She grinned slyly and refused to tell me where the money came from.
  • The poor boy grinned inanely, without any knowledge of what was happening.
  • She jumped when she saw a grinning face at the window.
  • My friends grinned at me encouragingly when I came onto the stage.

(Definition of “grin” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"grin" in American English

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grinnoun [ C ]

us /ɡrɪn/

a wide smile:

He flashed a big grin and gave us a thumbs up.
verb [ I ] us /ɡrɪn/ -nn-

He grinned and waved to us.

(Definition of “grin” from the Cambridge Academic Content Dictionary © Cambridge University Press)