donation

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The act of giving to a fund or cause.
• noun A gift or grant.

from The Century Dictionary.

• noun The act of giving or bestowing; a granting.
• noun That which is gratuitously given; a grant; a gift.
• noun In law, the act or contract by which the ownership of a thing is transferred by one person to another without consideration.

from the GNU version of the Collaborative International Dictionary of English.

• noun The act of giving or bestowing; a grant.
• noun That which is given as a present; that which is transferred to another gratuitously; a gift.
• noun (Law) The act or contract by which a person voluntarily transfers the title to a thing of which be is the owner, from himself to another, without any consideration, as a free gift.
• noun [U.S.] a party assembled at the house of some one, as of a clergyman, each one bringing some present.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A voluntary gift or contribution for a specific cause.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a voluntary gift (as of money or service or ideas) made to some worthwhile cause
• noun act of giving in common with others for a common purpose especially to a charity