to grow up v. Of a custom, state of things, etc.: To arise gradually, come into existence.

To extend by natural development. Also figurative and in figurative contexts. intransitive. To arise or spring from. Obsolete. rare.

intransitive. To grow, mature; to become more advanced or elaborate. Also: to change gradually into something more advanced. Hence (more loosely): to…

transitive. To produce or give rise to (a condition, circumstance, process, etc.) as a natural consequence. Also intransitive: to arise.

Originally U.S. intransitive. To evolve, to develop by evolution.