Thinking about something too much or too long.
Overthinking can make people feel worried or stressed. It can make it hard to make decisions.
Examples:
I am overthinking this problem.
She is always overthinking everything.
Overthinking can make things seem worse than they are.
Stop overthinking and just do it!
He is overthinking so much, he can't even sleep.
I am overthinking this so much, I can't even remember what I was thinking about!