Ambulator \Am"bu*la`tor\, n. 1. One who walks about; a walker. [1913 Webster] 2. (Zool.) (a) A beetle of the genus {Lamia}. (b) A genus of birds, or one of this genus. [1913 Webster] 3. An instrument for measuring distances; -- called also {perambulator}. --Knight. [1913 Webster]