rapid

adj

1. Very swift or quick.

   “a rapid stream”

   “rapid growth”

   “rapid improvement”

   “Ascend my Chariot; guide the rapid Wheeles.”

   “The most rapid and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite. There is something humiliating about it.[…]Can those harmless but refined fellow-diners be the selfish cads whose gluttony and personal appearance so raised your contemptuous wrath on your arrival?”

2. Steep, changing altitude quickly. (of a slope)
3. Needing only a brief exposure time. (of a lens, plate, film, etc.)
4. (England, dialectal)Violent, severe.
5. (dialectal, obsolete)Happy.

adv

1. (archaic, colloquial)Rapidly.

noun

1. (plural-normally)A rough section of a river or stream which is difficult to navigate due to the swift and turbulent motion of the water.
2. (dated)A burst of rapid fire.
3. (abbreviation, alt-of, ellipsis)Ellipsis of rapid chess.

   “In these rapid games we had just twenty-five minutes each to make all our moves, a far cry from traditional chess, where games can last up to seven hours.”

   “In order to avoid misunderstanding, I must note that I object to the attempts to displace normal chess with fast play, not rapid or blitz in general. I love them both, and, if I were to choose which to play, classic or rapid, I would choose rapid.”

   “I haven’t played against Wesley So—I’ve played him a bunch online in rapid games, but not in classical rounds.”