transaction

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

• noun The act of transacting or the fact of being transacted.
• noun Something transacted, especially a business agreement or exchange.
• noun Communication involving two or more people that affects all those involved; personal interaction.
• noun A record of business conducted at a meeting; proceedings.

from The Century Dictionary.

• noun The management or settlement of an affair; a doing or performing: as, the transaction of business.
• noun A completed or settled matter or item of business; a matter or affair either completed or in course of completion: as, a transaction of questionable honesty.
• noun plural The reports or publications containing the several papers or abstracts of papers, speeches, discussions, etc., which have been read or delivered at the meetings of certain learned societies. Those of the Royal Society of London are known as the Philosophical Transactions.
• noun In civil law, an adjustment of a dispute between parties by mutual agreement; the extinguishing of an obligation by an agreement by which each party consents to forego part of his claims in order to close the matter finally.

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

• noun The doing or performing of any business; management of any affair; performance.
• noun That which is done; an affair.
• noun (Civil Law) An adjustment of a dispute between parties by mutual agreement.
• noun the published record of what it has done or accomplished.

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

• noun The act of conducting or carrying out (business, negotiations, plans).
• noun A deal or business agreement.
• noun An exchange or trade, as of ideas, money, goods, etc.
• noun finance The transfer of funds into, out of, or from an account.
• noun computing An atomic operation; a message, data modification, or other procedure that is guaranteed to perform completely or not at all (e.g. a database transaction).
• noun especially in plural A record of the proceedings of a learned society

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

• noun the act of transacting within or between groups (as carrying on commercial activities)