eaves /iːvz/ noun[plural only]2 •The underside of a roof that extends beyond the external walls of a building.Him that you term'd Sir, the good old Lord Gonzallo, / His teares runs downe his beard like winters drops / From eaues of reeds: […] — 1610 •Something that extends over or projects beyond.But after many strains and heaves / He got up to the Saddle eaves. — 1662