noun Informal.

an act, instance, or gesture of assent, approval, or the like.

Origin of thumbs-up

First recorded in 1920–25 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for thumbs-up

Contemporary Examples of thumbs-up

Historical Examples of thumbs-up

  • Nelda was at the wheel, and Gladys, beside her on the front seat, raised a white-gloved hand in the thumbs-up salute.

    Murder in the Gunroom

    Henry Beam Piper