eject

Eject is a verb meaning to throw out, expel, or release something from a contained space. It can describe physically dislodging an object, removing a device or occupant, or discharging a formed emission. Noun forms include ejection and ejecta in scientific contexts.

In science, eject refers to material expelled from a body as a result of an impact, eruption, or explosion. Ejecta can form a plume, blanket, or debris field, and is studied in geology, volcanology, and planetary science. In astronomy, supernovae and comet outbursts produce ejecta that expands into space.

In engineering and machinery, ejector mechanisms deal with expelling spent components or moving fluids. In firearms, the ejector is a component that expels spent cartridge cases after firing. In aerospace, ejection systems use a seat or device to propel a crew member clear of an aircraft, deploying parachutes. Ejector pumps and jet pumps use high-velocity jets to entrain and move liquids.

In computing and consumer electronics, eject describes removing media or devices: to eject a CD, DVD, or flash drive from a drive or slot; many software interfaces provide an Eject option.

In social or organizational contexts, to eject means to forcibly remove a person from a venue, group, or activity, often as a disciplinary action.