1. To pursue one in a ghostly or otherwise supernatural form. If you don't do exactly what I want at my funeral, I'll return to haunt you all! The ghost of the business partner he betrayed had returned to haunt him in the night.

2. For a past situation, decision, etc. to cause problems for one in the present or future. With the organized strike shutting down his production line entirely, the CEO's poor treatment of his employees has returned to haunt him. Her remarks during the campaign returned to haunt her in the first debate with he opponent.

3. To come back continually to one's consciousness, as of a thought or memory. The same nightmare returns to haunt me every time I fall asleep. The awful terms on which I ended my friendship with Helen keep returning to haunt me.