1. a vegetable with long, thin, whitish or palegreenstems that can be eatenuncooked or cooked:

a stick of celery

2. a vegetable with long, green stems that can be eaten raw or cooked

3. Celery (Apium graveolens) is a marshland plant in the family Apiaceae that has been cultivated as a vegetable since antiquity. Celery has a long fibrous stalk tapering into leaves. Depending on location and cultivar, either its stalks, leaves or hypocotyl are eaten and used in cooking. Celery seed powder is used as a spice.