絵画展覧会の開催日の前日。または、絵画展覧会のオープンパーティー。
1.a reception at a gallery for an artist whose show is about to open to the public.
2.Also called varnishing day. the day before the opening of an art exhibition traditionally reserved for the artist to varnish the paintings.
Citations for vernissage
I went to the vernissage taking with me a friend, the invitation I had been given admitting two. We went very early. I had been told to go early otherwise we would not be able to see anything, and there would be no place to sit …