Entry 2 senses Webster, 1913 moorhen · IPA /ˈmʊɹˌhɛn/ 01 n. A black gallinule (Gallinula chloropus) that inhabits ponds and lakes. 1. A black gallinule (Gallinula chloropus) that inhabits ponds and lakes.(Zool.) 2. The female of the moor fowl; the moor hen. Also: moor hen See: moor fowl Syn. Gallinula chloropus.