Transaction

Noun

1. The act of conducting or carrying out (business, negotiations, plans).

   "The transaction was made on Friday with the supplier."

2. A deal or business agreement. (Can we add an example for this sense?)
3. An exchange or trade, as of ideas, money, goods, etc.

   "I made the transaction with the vendor as soon as she showed me the pearls."

4. The transfer of funds into, out of, or from an account.
5. 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).