Definition of squill

• n. - A European bulbous liliaceous plant (Urginea, formerly Scilla, maritima), of acrid, expectorant, diuretic, and emetic properties used in medicine. Called also sea onion.
• n. - Any bulbous plant of the genus Scilla; as, the bluebell squill (S. mutans).
• n. - A squilla.
• n. - A mantis.