Entry 2 senses · 2 variants Webster, 1913 Cowish /(kou"ĭsh)/ · Cow·ish · IPA a. n. 01 a. Timorous; fearful; cowardly. 1. Timorous; fearful; cowardly.[R.] 02 n. An umbelliferous plant (Peucedanum Cous) with edible tuberous roots, found in Oregon. 1. An umbelliferous plant (Peucedanum Cous) with edible tuberous roots, found in Oregon.(Bot.)