quickly//ˈkwɪkli//A2Frequency Level 4NeutralAdverbquicklyCanonical formmore quicklyComparativemost quicklySuperlative1at a fast speed; rapidlyShe walked quickly to catch the bus.2within a short time; soonI'll be back quickly.3without delay; promptlyPlease reply quickly to this email.SynonymrapidlyswiftlyspeedilyfastAntonymslowlygradually