RhymeZone: lemongrass definitions

Definitions of lemongrass:

noun: One of various species of grass of the genus Cymbopogon, especially Cymbopogon citratus, which have a lemon-like taste and aroma, and are used in cooking, for tea, and for fragrance.
noun: (colloquial, US) Sourgrass, Oxalis pes-caprae.

(Definitions from Wiktionary)