1.A low wall or sturdy barrier built out into the sea from a beach to check erosion and drifting.
‘When a school passes beneath a pier or drifting boat, or within casting distance of a rock groin or favorite stretch of beach, every bait in its path gets picked up.’
‘The construction of _groynes_ along the Ennore Expressway and the subsequent formation of beaches on the southern side have served as protection against tsunami, according to an ocean scientist in Chennai.’
|noun|
‘When a school passes beneath a pier or drifting boat, or within casting distance of a rock groin or favorite stretch of beach, every bait in its path gets picked up.’
