Entry 1 sense Webster, 1913 Musquash · Mus·quash · IPA /ˈmʌs.kɒʃ/ 01 n. See Muskrat. 1. See Muskrat.(Zool.) See: Muskrat Phrases & compounds Musquash root — an umbelliferous plant (Cicuta maculata), having a poisonous root. See Water hemlock.