Entry 2 senses · 2 variants Webster, 1913 Wahoo /wəh-o͞o'/ · Wa·hoo · IPA /wəhˈuː/ n. n. 01 n. Any of various American trees or shrubs; 1. Any of various American trees or shrubs; 02 n. A dark blue scombroid food fish (Acanthocibium solandri [or] Acanthocibium petus) of Florida and the West Indies. 1. A dark blue scombroid food fish (Acanthocibium solandri [or] Acanthocibium petus) of Florida and the West Indies.