peppermint UK /ˈpɛpəˌmɪnt/US /ˈpɛpɚˌmɪnt/ noun3 •A hybrid herb of the mint family (Mentha × piperita), formed by crossing watermint and spearmint, which has a high menthol content and a sharp flavor and is used in cooking, especially in herb teas and in confections. •Any of various sweets containing extract of the peppermint herb; peppermint confectionery. •(Australia) Any of various eucalypts of southeastern Australia whose leaves yield peppermint-like essential oils.In the hissing flames, Greenhill and Travers boiled the bark from peppermint gums and roasted their kangaroo-skin jackets. — 2004 formspeppermints