What is the meaning of Mustard?

A plant of certain species of the genus Brassica, or of related genera (especially Sinapis alba, in the family Brassicaceae, with yellow flowers, and linear seed pods).

Powder or paste made from seeds of the mustard plant, and used as a condiment or a spice.

The leaves of the mustard plant, used as a salad.

Dark yellow colour, the colour of mustard.

One of a family of vesicants containing one or more 2-chloroethyl (C₂H₄Cl) groups, commonly used in chemical warfare and cancer chemotherapy.

The tomalley of a crab, which resembles the condiment.

Ellipsis of mustard gas.

Energy, power (when throwing a baseball).

Of a dark yellow colour.

Very good, or very skilled.

cudgel (root of mustard)

A mustard plant; the plant where mustard seeds originate.

The seeds of this plant used as a spice or flavouring.

Mustard; a condiment made from mustard seeds.

Source: wiktionary.org