Entry 2 senses · 2 variants Webster, 1913 Ross /räs/ · IPA /ɹɔs/ n. v. t. 01 n. The rough, scaly matter on the surface of the bark of trees. 1. The rough, scaly matter on the surface of the bark of trees.[Prov. Eng. & Local, U.S.] 02 v. t. To divest of the ross, or rough, scaly surface; as, to ross bark. 1. To divest of the ross, or rough, scaly surface; as, to ross bark.[Local, U.S.]