to fail to help or support somebody as they had hoped or expected I'm afraid she let us down badly. This machine won't let you down. He trudged home feeling lonely and let down. related noun let-down
to make somebody/something less successful than they/it should be She speaks French very fluently, but her pronunciation lets her down.
- 1to let or make something go down We let the bucket down by a rope.
- 2to make a dress, skirt, coat, etc. longer, by reducing the amount of material that is folded over at the bottom This skirt needs letting down. opposite take somethingup
- 3(British English) to allow the air to escape from something deliberately Some kids had let my tyres down.