to make a clear picture of something in your mind, especially something that may happen or that you want to do
She visualized the finished room.
He visualized himself giving the speech.
With a person, use visualize someone doing something, not visualize someone to do something.
Common phrases & grammar
visualize success · visualize the future · visualize yourself doing something · visualize a goal
subject + visualize(s) + noun
subject + visualize(s) + yourself/someone + verb-ing