precept

precept is a   Noun

Definition:

[1] Any commandment, instruction, or order intended as an authoritative rule of action; esp., a command respecting moral conduct; an injunction; a rule. For precept must be upon precept. Isa. xxviii. 10. No arts are without their precepts. Dryden.

[2] A command in writing; a species of writ or process. Burrill.

Synonyms: