(idiomatic) A well-known convention (often the most well-known of a certain field) which supposedly can not or should not be broken.

plural of co-commander

A joint commander; a person sharing a role of military command.

A section of a manned spacecraft in which the astronauts live and operate the craft. / (specifically, in relation to the Apollo programme) Shortened form of command and service module.

(military, law enforcement) The management and logistics of a military or paramilitary force.

(Marxism) Clipping of commanding heights of the economy: Certain strategically important sectors of the economy such as public utilities and natural resources.

simple past tense and past participle of c-command

present participle of c-command

Alternative form of archcommander

(military) The shore-based officer (aviator) responsible to the landing force commander for control and coordination of air operations within the landing force commander's area of operations when control of these operations is passed ashore.