Synonym: acquire, advance, benefit, come along, earn, get, improve, look up, make progress, obtain, pick up, receive, secure. Antonym: lose. Similar words: again, regain, against, ungainly, all over again, fight against, struggle against, maintain. Meaning: [geɪn] 
n. 1. a quantity that is added 2. the advantageous quality of being beneficial 3. the amount of increase in signal power or voltage or current expressed as the ratio of output to input 4. the amount by which the revenue of a business exceeds its cost of operating. v. 1. obtain 2. win something through one's efforts 3. derive a benefit from 4. reach a destination, either real or abstract 5. obtain advantages, such as points, etc. 6. rise in rate or price 7. increase in 8. earn on some commercial or business transaction; earn as salary or wages 9. increase (one's body weight).
n. 1. a quantity that is added 2. the advantageous quality of being beneficial 3. the amount of increase in signal power or voltage or current expressed as the ratio of output to input 4. the amount by which the revenue of a business exceeds its cost of operating. v. 1. obtain 2. win something through one's efforts 3. derive a benefit from 4. reach a destination, either real or abstract 5. obtain advantages, such as points, etc. 6. rise in rate or price 7. increase in 8. earn on some commercial or business transaction; earn as salary or wages 9. increase (one's body weight). 
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181. Why not give it a go? You've nothing to lose and everything to gain.
182. Many people get caught/trapped in a vicious circle of dieting and weight gain.
183. Symptoms include weight gain, sleep disorders and loss of libido.
184. The company stands to gain quite a lot from this government scheme.
185. You won't be hornswoggled if you don't want to gain extra advantage.
186. Students can gain valuable experience by working on the campus radio or magazine.
187. A determined burglar will not shirk from breaking a window to gain entry.
188. He knew how to win by craft and diplomacy what he could not gain by force.
189. He had represented himself as an employee in order to gain access to the files.
190. Women still have to overcome many obstacles to gain equality.
191. The government has managed to gain the commitment of employers to the scheme.
192. We shouldn't seek after comfort, personal fame , or gain.
193. Regular exercise is the best way of preventing weight gain.
194. Opportunism consists of sacrificing fundamental interests in order to gain temporary, partial benefits.
195. Hundreds of people were unable to gain admittance to the hall.
196. This is a cynical manipulation of the situation for short-term political gain.
197. Good economic indicators caused the share index to gain ten points.
198. The firm is anxious to gain a toehold in the North American market.
199. The programme affords young people the chance to gain work experience.
200. A lot of people who lose weight gain it back over time, and end up back where they started.
201. It is impossible for a small company to gain on the big one while business is so inactive. Sentencedict.com
202. Side effects of the drugs may include tiredness, headaches or weight gain.
203. What do firms think they stand to gain by merging?
204. We need to gain a clearer perception of how young people feel about the problem.
205. The company is eager to gain a foothold in Europe.
206. The court heard that he stood to gain millions in insurance on his wife.
207. It is difficult for a lay person to gain access to medical libraries.
208. We have a net gain of nearly 50 seats, the biggest for any party in Scotland.