What is the meaning of Bullion?

A bulk quantity of precious metal, usually gold or silver, assessed by weight and typically cast as ingots.

Base or uncurrent coin.

Showy metallic ornament, as of gold, silver, or copper, on bridles, saddles, etc.

A heavy twisted fringe, made of fine gold or silver wire and used for epaulets; also, any heavy twisted fringe whose cords are prominent.

The mark left on a glass piece from its attachment to a punty.

Source: wiktionary.org