Noun

1. the day before the opening of an exhibition when paintings are varnished and retouched
2. a private viewing of an exhibition before it opens to the public

   • 1893: the artists' association will be forced to advance or delay its vernissage and opening day. — The Times, 2 May 1893, p.5 col. C

Noun

1. varnishing, glazing
2. a private viewing at a gallery