Black-Jack

Part of speech: noun (n.)

1. A name given by English miners to sphalerite, or zinc blende; - - called also false galena. See Blende.

2. Caramel or burnt sugar, used to color wines, spirits, ground coffee, etc.

3. A large leather vessel for beer, etc. [Obs.]

4. The Quercus nigra, or barren oak.

5. The ensign of a pirate.