From Longman Dictionary of Contemporary Englishat the doubleat the doubleBritish English, on the double American EnglishFAST/QUICK informal very quickly and without any delay He was told to get back to Washington on the double. → double
Examples from the Corpus
at the double• He dived away at the double and took himself as far as his long legs would carry him.• Mercury prepares to expand at the double WALLASEY-based same-day courier service Mercury Express has embarked on a national expansion.• I looked at the double doors in horror and wondered if perchance Toplis might be hiding inside.• Not much is gained by pointing at the double standards of western nations; these are too well known.• You have taken on far too much and are trying to do too many things at the double. 