Entry 1 sense Webster, 1913 Pollan /päl'-ən/ · Pol·lan · IPA /pˈɑlən/ 01 n. A lake whitefish (Coregonus pollan), native of Ireland. In appearance it resembles a herring. 1. A lake whitefish (Coregonus pollan), native of Ireland. In appearance it resembles a herring.(Zool.)