scull1 / skəl/ • n. each of a pair of small oars used by a single rower. ∎ an oar placed over the stern of a boat to propel it by a side-to-side motion, reversing the blade at each turn. ∎ a light, narrow boat propelled with a scull or a pair of sculls. ∎ (sculls) a race between boats in which each participant uses a pair of oars.• v. [intr.] propel a boat with sculls. ∎ [tr.] transport (someone) in a boat propelled with sculls. ∎ [intr.] (of an aquatic animal) propel itself with fins or flippers.scull2 • n. Can. a large group of fish that has migrated from the open sea to inshore waters. ∎ the season when this happens.