(1):

(n.) A varnish, consisting of a solution of shell-lac in alcohol, often colored with gamboge, saffron, or the like; - used for varnishing metals, papier-mache, and wood. The name is also given to varnishes made of other ingredients, esp. the tough, solid varnish of the Japanese, with which ornamental objects are made.

(2):

(v. t.) To cover with lacquer.