1 rapid, fast, speedy, swift, fleet; expeditious, express:
We made a quick descent to reach the camp before dark. The hand is quicker than the eye. Can you arrange the quick delivery of this parcel to Aylesbury?
2 sudden, precipitate, hasty, brisk, short, abrupt, hurried, perfunctory, summary; immediate, prompt, timely, instantaneous:
There is no quick answer to your question about the causes of World War II. Don't be so quick to criticize others. I had a quick response to my letter complaining about service
3 agile, lively, nimble, energetic, vigorous, alert, animated, keen, sharp, acute, spry, spirited, vivacious, rapid, swift:
In three quick steps she was at my side. Antonia is known for her quick mind
4 intelligent, bright, brilliant, facile, adept, adroit, dexterous, apt, able, expert, skilful, deft, astute, clever, shrewd, smart, ingenious, perceptive, perspicacious, discerning, far-sighted, responsive; nimble-witted, quick-witted:
You can rely on Rob's quick thinking to come up with a solution to the problem
5 excitable, touchy, testy, petulant, irascible, irritable, impatient:
She said that I have a quick temper because of my red hair.