ideationnoun
uk/ˌaɪ.diˈeɪ.ʃən//ˌaɪ.diˈeɪ.ʃən/formal[ U ] the activity of forming ideas in the mind:
Taking these drugs might increase suicidal ideation.
[ C ] an idea of something in someone's mind:
What I'm hearing is my ideation of how the joke is going to go over with the audience.