the world > space > shape > curvature > types of curvature > [verb (transitive)] > curve inwards (3)
transitive. To bend or fold (something, esp. fabric) inwards. Cf. main sense 8.
transitive. To bend into a curved form, to curve (= incurvate, v. 1); in modern use, To curve or bend (something) inwards.
transitive. To bring into a curved shape; to bend from a straight line or form; to curve, to crook; now, spec., to bend or curve inwards.