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English definition of “bonus”

bonus

noun [C]  /ˈboʊ·nəs/ us  
an extra amount of money given to someone as a reward for work or as encouragement: The salary was $40,000, plus a bonus. A bonus is also any result that is an unexpected benefit: After the heart transplant, every day is a bonus for me.
(Definition of bonus from the Cambridge Academic Content Dictionary © Cambridge University Press)
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