Moving or functioning rapidly and energetically; speedy: an animal that is quick enough to escape most predators.
Learning, thinking, or understanding with speed and dexterity; bright: a quick mind.
Perceiving or responding with speed and sensitivity; keen: quick reflexes. Reacting immediately and sharply: a quick temper.
Occurring, achieved, or acquired in a relatively brief period of time: a quick rise through the ranks; a quick profit. Done or occurring immediately: a quick inspection. See Synonyms at fast1.
Tending to react hastily: quick to find fault.
Archaic Alive. Pregnant.
Sensitive or raw exposed flesh, as under the fingernails.
The most personal and sensitive aspect of the emotions: The remark cut her to the quick.
The living: the quick and the dead.
The vital core; the essence: got to the quick of the matter.