combination lock• Next to it was a steelsecuritycupboard fitted with a combination lock.• I took it down from the wall to reveal the circular door of a wall safe with a combination lock.• The case sportedmatchingbrasshardware, including a pair of clasps, each with its own three-number combination lock.• The only thing holding me up would be fumbling at the combination lock or renting a towel.• Remember the analogy of the combination lock.