What is the term for a secondary or suggested meaning of a word? (apex)

Apex is defined as the tip of a summit or the climax of something or someone. It could also be called "the turning point or pivotal". If used in a sentence, it could be: The apex of her life happened when she graduated college – shifting from a mere college student to a worker in the society.

well people will have to mark your answer as the best answer. and from that u receive crowns.

~batmans wife dun dun

i need some details.