Verb
gain weight (third-person singular simple present gains weight, present participle gaining weight, simple past and past participle gained weight)
- (intransitive) To become more heavy or obese.
- Synonyms: put on weight, (UK slang) put some timber on
- Antonym: lose weight
- To be taken more seriously. (of an idea, view etc.)
1939 July, John D. Hewitt, “Some Notable British Main Lines: 1. Settle and Carlisle, L.M.S.R.”, in Railway Magazine, page 35:This view gaining weight, steps were taken to reopen negotiations with the L.N.W.R.