all systems are go Definition

system
noun

1. A set of interconnected or interrelated parts forming a complex whole.

Example: the transport system
Example: the human digestive system
2. An arrangement of mechanical, electrical or electronic parts functioning as a unit.

Example: a stereo system
3. A way of working; a method or arrangement of organization or classification.

Example: a more efficient filing system
Example: the capitalist system
Thesaurus: method, mode, scheme, way, custom, practice, modus operandi, plan, procedure, routine, technique; organization, structure, protocol, framework, hierarchy, order, construct, edifice, taxonomy.
4. Efficiency of organization; methodicalness; orderliness.

Example: You need to get some system into your exam revision
5. One's mind or body regarded as a set of interconnected parts.

Example: get the anger out of your system
6. Society, or the network of institutions that control it, usually regarded as an oppressive force.

Form: the system
7. astron.
A group of heavenly bodies consisting of a central body (eg a sun or a planet) and others (planets or moons respectively) which move around it under the influence of their mutual attraction.
Example: the solar system
8. geol.
The basic unit of classification of rock strata formed during a single period of geological time, ranking above series (sense 8) and characterized by its fossil content.
9. An interrelated body of doctrines or theories; a full and connected view of some branch of knowledge.

Idiom: all systems go (all systems are go)

colloq
Everything is ready A 20c: originally astronautics jargon.

Etymology: 17c: from Greek systema.