What is the meaning of Nosebag?

A sack or bag for feeding a horse, mule, ox or similar animal, generally on the move or away from the home stable or paddock. Designed to be attached to harness and slipped over the animal's nose to permit feeding while eliminating spillage; designs vary.

Food or feeding.

A nosy person. (Can we add an example for this sense?)

Source: wiktionary.org