A transceiver is a component of a wireless device that is able to both transmit and receive information through radio waves. It is a combination of a transmitter and receiver, hence the name transceiver. Transceivers are most commonly used in wireless devices, like cell phones. Other common examples include walkie-talkies and CB radios.
Despite the widespread use of transceivers, one common device that does not use them is a radio. A radio only has a receiver that receives the radio signal transmitted by radio stations for the listeners to enjoy.