Definitions:

1. In financial context, refers to a stock, commodity, or investment that has increased in value. NOUN
   • Technology companies were among the top gainers in the market today.
2. In metaphorical use, refers to someone who benefits or acheives success in a given situation. NOUN
   • In the negotiations, she emerged as the clear gainer.
3. In sports and acrobatics context, refers to a type of flip or somersault performed in gymnastics, diving, or other activies, where the athlete moves backward while traveling forward. NOUN
   • He performed a perfect gainer off the diving board.
4. In weight context, refers to someone or something that gains weight, often intentionally. NOUN
   • The supplement is marketed toward weight gainers who want to build muscle mass.
5. Someone who achieves or increases something, such as wealth, weight, or advantage. NOUN
   • She was the biggest gainer from the stock market rally.

Synonyms:

• achiever
• advancer
• Beneficiary
• improver
• Winner