Ejection may refer to the following:
- Ejection seat, safety device typically used to escape an aircraft in-flight.
- Ejection (sports), the act of officially removing someone from a game.
- Acoustic droplet ejection, a method of moving fluid using ultrasound.
- Coronal mass ejection, ejection of material from a sun's corona.
- Ejection fraction, the fraction of blood pumped with each heart beat.
- Ejecta, particles ejected from an impact crater or volcanic eruption.
- In computing, when removable media is physically pushed out of a floppy disk drive or optical disc drive, or more generally disconnected.
- Great Ejection, an event in England in 1662 when non-conforming ministers lost their positions.