horsemintPronunciation: /ˈhɔːsmɪnt/Definition of horsemint noun a tall coarse kind of mint. Genera Mentha and Monarda, family Labiatae: several species and hybrids Origin: Middle English: from horse (often used in the names of plants to denote a coarse variety) + mint1horsemint in other Oxford dictionaries Definition of horsemint in the US English dictionary