1. an aromatic exudate from the mastic tree; used chiefly in varnishes • Hypernyms: natural resin 2. a pasty cement used as an adhesive or filler • Hypernyms: cement, filler 3. an evergreen shrub of the Mediterranean region that is cultivated for its resin • Syn: mastic tree, lentisk, Pistacia lentiscus • Hypernyms: shrub, bush • Member Holonyms: Pistacia, genus Pistacia