One is not or is no longer obliged or required (to do something). A: "I still have to write a card for her birthday!" B: "No need to—I already wrote one this morning." There's no need to drive me all the way to the airport, you know. I'm perfectly fine getting a bus. A: "I'll walk you to your door." B: "Thank you, but there's really no need. I can manage just fine on my own.