In mechanics, a compound machine, or artificial instrument, composed of different parts, and intended to produce some effect by the help of the mechanical powers; as a pump, a windlas, a capstan, a fire engine, a steam engine.

A military machine; as a battering ram.

Any instrument; that by which any effect is produced. An arrow, a sword, a musket is an engine of death.

A machine for throwing water to extinguish fire.

Means; any thing used to effect a purpose.

An agent for another; usually in an ill sense.