I.a pressing or squeezing out.
II. In partic.
A. In mechanics, a forcing apparatus to raise water, Vitr. 1, 1; 8, 7; cf. 2. expressus.—
B. In architect., a projection, i. e. a fillet, listel, Vitr. 4, 4 fin. —
C. Of lang., vividness: summā expressione describere, Ambros. de Cain et Abel, 1, 2, 9.