Wiktionary
n. (prime directive English)
Usage examples of "prime directives".
Children don't fulfill the prime directives of the genetic programming, namely, to keep ourselves alive and well, and to pass on the genetic code.
Spock would try for a place where they could not be seen to transport up, not to disturb this culture or chance violating the Prime Directives of noninterference by showing the transporter process.
But one of Hal's prime directives is to keep Discovery out of danger.
It means that if I need to go into this situation and break one or more Prime Directives, and if by doing so I keep the situation from blowing up, and Fleet likes the way I handled things, they'll probably give me a medal.
Modular Man could not evolve away his prime directives as long as his computer consciousness was physically intact, any more than a human could, unassisted, evolve away his genetic makeup in a single lifetime.
This was something he would have done earlier but for the fact that one of his prime directives forbade any conflict with authority.