mastic

noun

1. 1

   An evergreen shrub or small tree, Pistacia lentiscus (mastic tree), native to the Mediterranean.

2. 2

   A hard, brittle, aromatic and transparent resin produced by this tree and used to make varnishes and chewing gum, and as a flavouring.

3. 3

   An alcoholic liquor flavoured with this resin.

4. 4

   A flexible, waterproof cement used as an adhesive, sealant or filler.