Acceptor may refer to:
- Acceptor (accounting), the addressee of a bill of exchange.
- In the Indian Contract Act of 1872, the acceptor is the person to whom a proposal is made, and who has communicated his or her acceptance of the said proposal.
- In chemistry, the electron acceptor is an atom or compound to which electrons are donated during the formation of a coordinate covalent bond.
- Acceptor (semiconductors).
- In sequential logic, an Acceptor is a type of finite state machine.