A marriage certificate.
A single sheet or scrap of paper.
A deal or business agreement.
A social interaction.
A record of the proceedings of a learned society.
An exchange or trade, as of ideas, money, goods, etc.
The act of conducting or carrying out (business, negotiations, plans).
The transfer of funds into, out of, or from an account.
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).