The meaning of Grimace and additional information.

Grimace(n.) A distortion of the countenance, whether habitual, from affectation, or momentary aad occasional, to express some feeling, as contempt, disapprobation, complacency, etc.; a smirk; a made-up face.

Grimace(v. i.) To make grimaces; to distort one's face; to make faces.

Grimaced(a.) Distorted; crabbed.