sempergreen🔊nounUK /ˈsɛmpəɡɹiːn/Etymology From semper- + green.1No plural, Obsolete, Rare An evergreen.The common Bay-tree, which is a sempergreen, is now commonly found in most Gardens.1694: William Westmacott, Θεολοβοτονολογία sive historia vegetabilium sacra; or a scripture herbal, page 18