double-quick /ˌdʌb.əlˈkwɪk/adjective 1adverb 1noun 1verb 1forms 3 adjective1 •Very quick; often used in the phrase in double-quick time. adverb1 •Very quickly; at once; on the double. noun1 •The double time, a marching cadence (pace) approaching running speed. verb1 •To double-time, march (or rather run) at the above speedy pace. formsdouble-quicked · double-quicking · double-quicks