beet /biːt/verb 3noun 2forms 1 verb3 •(dialect, no longer used) To improve; to mend. •(dialect, no longer used) To kindle a fire. •(dialect, no longer used) To rouse. noun2 •Beta vulgaris, a plant with a swollen root which is eaten or used to make sugar.The beet is a hardy species. •(US, Canada) A beetroot; a swollen root of such a plant used as a culinary vegetable. formsbeets