Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
rush-grass is a noun meaning "grass having wiry stems and sheathed panicles". It carries one recorded sense.
grass having wiry stems and sheathed panicles
Definitions, synonyms and semantic relations for rush-grass come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.