noun the act of contributing.
2. contribution ·noun an irregular and arbitrary imposition or tax leved on the people of a town or country.
3. contribution ·noun payment, by each of several jointly liable, of a share in a loss suffered or an amount paid by one of their number for the common benefit.
4. contribution ·noun that which is contributed;
either the portion which an individual furnishes to the common stock, or the whole which is formed by the gifts of individuals.