pollackPronunciation: /ˈpɒlək/ (also pollock)Definition of pollack noun (plural same or pollacks) an edible greenish-brown fish of the cod family, with a protruding lower jaw. Found in the NE Atlantic, it is popular with anglers. Pollachius pollachius, family Gadidae Origin: late Middle English: perhaps of Celtic originpollack in other Oxford dictionaries Definition of pollack in the US English dictionary