noun 1. [ mass noun] — the dried aromatic fruit of a Caribbean tree, used whole or ground as a culinary spice and in the production of certain liqueurs such as Benedictine. 2. a tree of the myrtle family from which allspice is obtained. Also called pimento or Jamaica pepper.● Pimenta dioica, family Myrtaceae. 3. an aromatic North American tree or shrub.●Genus Calycanthus, family Calycanthaceae.