Commentary: contribution - a voluntary gift(as of money service or ideas) made to some worthwhile cause
They asked for a $6 donation instead of charging admission.
George always makes a large donation to the beer fund.
WordNet 2.0 Sense Numbers: 1
Commentary: DONATION[+event] act of giving in common with others for a common purpose especially to a charity
His donation was in September.
WordNet 2.0 Sense Numbers: 2