Entry 2 senses · 2 variants Webster, 1913 Perrier /pĕr'-ē-ẽr/ · Per·ri·er · IPA /pˈɛriːər/ n. prop. n. 01 n. A short mortar used formerly for throwing stone shot. 1. A short mortar used formerly for throwing stone shot.(Mil.) 02 prop. n. The name of a brand of bottled mineral water; a glass or bottle of such water; as, I'll have a Perrier.. 1. The name of a brand of bottled mineral water; a glass or bottle of such water; as, I'll have a Perrier..