A crack is a slightly rude or cruel joke. When Paul made the crack about the `famous girl detective', I began to suspect that he had it in for you
A crack is a very narrow gap between two things, or between two parts of a thing. Kathryn had seen him through a crack in the curtains. = chink
A crack soldier or sportsman is highly trained and very skilful. a crack undercover police officer see also craic
A crack is a line that appears on the surface of something when it is slightly damaged. The plate had a crack in it Hundreds of office buildings and homes developed large cracks in walls and ceilings
A crack is a sharp sound, like the sound of a piece of wood breaking. Suddenly there was a loud crack and glass flew into the car `Crack!' -- The first shot rang out, hitting Paolo
emphasis If you say that someone does something at the crack of dawn, you are emphasizing that they do it very early in the morning. I often start work at the crack of dawn when there is a big order to get out
If you open something such as a door, window, or curtain a crack, you open it only a small amount. He went to the door, opened it a crack, and listened
If you have or take a crack at something, you make an attempt to do or achieve something. I should love to have a crack at the Olympia title in my last year = go, shot