Learner's definition of CONTRIBUTION
1 [count] : something that is contributed: such asa : something that is given to help a person, a cause, etc.
b : something that is done to cause something to happen
She made a 100-dollar contribution [=donation] to breast cancer research.
They thanked him for his contribution of time and money.
He made an important contribution to the debate.
c : a piece of writing that is published as part of a larger work (such as a magazine, newspaper, or book)
She's honored for her contributions [=efforts, work] towards finding a cure for AIDS.
As mayor, he made many positive contributions to the growth of the city.
2 [count] : a regular payment that is made to an employer or government for something (such as health insurance or a pension) 3 [noncount] : the act of giving something: the act of contributing