'Groyne' definitions:

Definition of 'groyne'

From: WordNet
noun
A protective structure of stone or concrete; extends from shore into the water to prevent a beach from washing away [syn: breakwater, groin, groyne, mole, bulwark, seawall, jetty]

Definition of 'Groyne'

From: GCIDE
  • Groyne \Groyne\, n. [Obs.] See Groin. [1913 Webster]