1. (noun)leek, scallion, Allium porrum plant having a large slender white bulb and flat overlapping dark green leaves; used in cooking; believed derived from the wild Allium ampeloprasum Synonyms: scallion, springonion, greenonion, leek
2. (noun)green onion, spring onion, scallion a young onion before the bulb has enlarged; eaten in salads Synonyms: scallion, springonion, greenonion, leek