leek /liːk/noun 2forms 1phrases 1 noun2 •A vegetable of variety Allium ampeloprasum, having edible leaves and an onion-like bulb but with a milder flavour than the onion. •Any of several species of Allium, broadly resembling the domesticated plant in appearance in the wild. formsleeks Phrases with leek swallow the leekTo change one's mind.
