Entry 2 senses · 2 variants Webster, 1913 Reem /(r?m)/ · IPA /ɹiːm/ n. v. t. 01 n. The Hebrew name of a horned wild animal, probably the Urus. 1. The Hebrew name of a horned wild animal, probably the Urus.(Zool.) 02 v. t. To open (the seams of a vessel's planking) for the purpose of calking them. 1. To open (the seams of a vessel's planking) for the purpose of calking them.(Naut.) Phrases & compounds Reeming iron — an iron chisel for reeming the seams of planks in calking ships.