Turbojet (noun)

1. A type of aircraft engine in which a turbine is used to compress air before combustion takes place, producing high velocity jets of air to provide propulsion.
2. An aircraft that uses a turbojet engine as its power source.

Origin:

A combination of the words 'turbo' meaning a type of engine and 'jet' meaning air expelled at high velocity.

Examples:

1. The first successful turbojet engine was invented in the 1930s.
2. Commercial airliners are powered by a number of turbojet engines.
3. The turbojet engine provided much more power compared to its predecessors and made air travel faster and more efficient.
4. The supersonic turbojet was first tested on military aircraft in the 1940s.
5. Due to their higher fuel efficiency, turbojet engines are still widely used in modern day aircrafts.