halfa grass noun2 •A north African and south Asian grass of species Desmostachya bipinnata, with tough stems woven into rope, sandals, mats, etc., and sacred in Hinduism, Buddhism and other religions. •Other north African grasses with similar uses, such as sparto (Stipa tenacissima and Lygeum sparticum) and cogongrass (Imperata cylindrica) formshalfa grasses