Definition of ow in English:

ow

exclamation

  • Used to express sudden pain:

    ‘Ow! You're hurting me!’
    • ‘‘OW! Let me go!’ you tell him. He doesn't listen to you.’
    • ‘Kevin gasped as the pain once again shot through his back, ‘Ow!’’

Origin

Natural exclamation: first recorded in English in the mid 19th century.

Pronunciation:

ow

/aʊ/