the middle › the central part, position, or point in time: We used to live just outside Boston but now we live right (= exactly) in the middle. The letter should arrive by the middle of next week.
be in the middle of doing sth › to be busy: I can't talk now - I'm in the middle of cooking a meal.
your middle informal › your waist, or your waist and stomach: He wrapped the towel round his middle.