(biology) A group of organs that work together as a biological system to perform one or more functions.

The system of buying and selling things via hire purchase.

(rail transport, historical) A block system in use on single-line railways, in which the stationmaster gives the driver a staff authorizing the driver to proceed over a given portion of track.

(UK, historical) The practice, abolished in 1871, of paying money to be made an officer in the cavalry and infantry regiments of the English and later British Army, without having to wait for promotion.

An extrasolar planetary system (“solar system”), a star system with exoplanets beyond our Solar System.

plural of system-monger

A person who is unduly fond of constructing systems.

A system of theatrical rigging, using ropes, blocks, etc., allowing the stage crew to fly (hoist) components such as curtains, lights and scenery.

(geomorphology) pattern formed by the streams, rivers, and lakes in a particular drainage basin

A system for managing contracts.