'As sound as a roach' definitions:

Definition of 'As sound as a roach'

From: GCIDE
  • Roach \Roach\, n. [OE. rroche; cf. AS. reohha, D. rog, roch, G. roche, LG. ruche, Dan. rokke ray, Sw. rocka, and E. ray a fish.]
  • 1. (Zool.) (a) A European fresh-water fish of the Carp family (Leuciscus rutilus). It is silver-white, with a greenish back. (b) An American chub (Semotilus bullaris); the fallfish. (c) The redfin, or shiner. [1913 Webster]
  • 2. (Naut.) A convex curve or arch cut in the edge of a sail to prevent chafing, or to secure a better fit. [1913 Webster]
  • As sound as a roach [roach perhaps being a corruption of a F. roche a rock], perfectly sound. [1913 Webster]