1 [mass noun] the aromatic leaves of a plant of the mint family, or an essential oil obtained from them, used as a flavouring in food: [as modifier]:peppermint creamspeppermint tea
[count noun] a sweet flavoured with peppermint oil:she sucked on her peppermints
2 [mass noun] the cultivated Old World plant which yields peppermint leaves or oil:a sprig of peppermint
Mentha × piperita, family Labiatae
3Australian any of a number of trees or shrubs with peppermint-scented foliage, in particular:
a gum tree with leaves that yield an aromatic essential oil (genus Eucalyptus, family Myrtaceae).a myrtle grown as an ornamental tree or shrub (genus Agonis, family Myrtaceae).
Derivatives
pepperminty
adjective
peppermint in other Oxford dictionaries
Definition of peppermint in the US English dictionary