Entry 2 senses · 2 variants Webster, 1913 Bamboo /(băm*bo͞o")/ · Bam·boo · IPA /bæmˈbu/ n. v. t. 01 n. A plant of the family of grasses, and genus Bambusa, growing in tropical countries. 1. A plant of the family of grasses, and genus Bambusa, growing in tropical countries.(Bot.) 02 v. t. To flog with the bamboo. 1. To flog with the bamboo.