Definition of OK sign in English:

OK sign

noun

US
  • A mark of ‘OK’, or other sign indicating that something is satisfactory; specifically a gesture made by forming the thumb and index finger into a circle with the remaining fingers raised and spread, signifying understanding, agreement, approval, etc., or that the signaller is all right.

Origin

1920s; earliest use found in Hart Crane (1899–1932), poet. From OK [interjection¹, noun², adverb] + sign.

Pronunciation

OK sign

/(ˌ)əʊˈkeɪ ˌsʌɪn/