Any of several kinds of mint; especially either of two hybrid mints, Mentha× smithiana (formerly M. rubra) (more fully "tall red mint") and M.× gentilis (more fully "bushy red mint"), which are grown for their fragrance and sometimes naturalized.
Origin
Middle English.
Definition of red mint in US English:
red mint
noun
Any of several kinds of mint; especially either of two hybrid mints, Mentha× smithiana (formerly M. rubra) (more fully "tall red mint") and M.× gentilis (more fully "bushy red mint"), which are grown for their fragrance and sometimes naturalized.