noun

1. GAIN, the amount of increase in signal power or voltage or current expressed as the ratio of output to input
2. GAIN, the advantageous quality of being beneficial
3. GAIN, the amount by which the revenue of a business exceeds its cost of operating
4. GAIN, a quantity that is added
5. GAIN, something wanted or valued that is gotten : something that is gained ; especially : money gotten through some activity or process
6. GAIN, something that is helpful : advantage or benefit
7. GAIN, an increase in amount, size, or number

verb

1. GAIN, increase (one's body weight)
2. GAIN, increase or develop
3. GAIN, rise in rate or price
4. GAIN, obtain advantages, such as points, etc.
5. GAIN, reach a destination, either real or abstract
6. GAIN, win something through one's efforts
7. GAIN, earn on some commercial or business transaction; earn as salary or wages
8. GAIN, derive a benefit from
9. GAIN, obtain
10. GAIN, to get (something wanted or valued)
11. GAIN, to win (something) in a competition, battle, etc.
12. GAIN, to gradually get (something) or more of (something) as time passes

1. The medication can cause nausea and weight gain.
2. attributed her recent weight gain to the medication she was taking
3. They stand to gain an advantage over their competitors by getting an early start.
4. What do you hope to gain from this?
5. gain control of the territory