couch grass Syllabification: (couch grass)Pronunciation: /kouCH, ko͞oCH/Definition of couch grass noun a coarse grass with long creeping roots, which can be troublesome in lawns and gardens. Genera Elymus and Agropyron, family Gramineae: several species, in particular the common couch (A. repens) Origin: late 16th century: variant of quitchcouch grass in other Oxford dictionaries Definition of couch grass in the British & World English dictionary
