Entry 1 sense Webster, 1913 Catamount /(kăt"ȧ*mount)/ · Cat·a·mount · IPA /ˈkætəˌmaʊnt/ 01 n. The cougar. Applied also, in some parts of the United States, to the lynx. 1. The cougar. Applied also, in some parts of the United States, to the lynx.(Zool.) See: cougar, lynx