n. a large amphibious long-tusked arctic mammal, Odobenus rosmarus, related to the seal and sea lion.
Phrases and idioms:
walrus moustache a long thick drooping moustache.
Etymology: prob. f. Du. walrus, -ros, perh. by metath. after walvisch 'whale-fish' f. word repr. by OE horschw{aelig}l 'horse-whale'