n.

1. a period of calm weather;
   lull
   
   • there was a lull in the storm
2. an untroubled state; free from disturbances;
   tranquillity, tranquility
3. the absence of sound;
   silence
   
   • he needed silence in order to sleep
   • the street was quiet
4. a disposition free from stress or emotion;
   repose, placidity, serenity, tranquillity, tranquility

v.

1. become quiet or quieter;
   quieten, hush, quiesce, quiet down, pipe down
   
   • The audience fell silent when the speaker entered
2. make calm or still;
   calm, calm down, tranquilize, tranquillize, tranquillise, quieten, lull, still
   
   • quiet the dragons of worry and fear

adj.

1. characterized by an absence or near absence of agitation or activity
   
   • a quiet life
   • a quiet throng of onlookers
   • quiet peace-loving people
   • the factions remained quiet for almost 10 years
2. free of noise or uproar; or making little if any sound
   
   • a quiet audience at the concert
   • the room was dark and quiet
3. not showy or obtrusive;
   restrained
   
   • clothes in quiet good taste
4. in a softened tone;
   hushed, muted, subdued
   
   • hushed voices
   • muted trumpets
   • a subdued whisper
   • a quiet reprimand
5. (of a body of water) free from disturbance by heavy waves;
   placid, still, tranquil, smooth, unruffled
   
   • a ribbon of sand between the angry sea and the placid bay
   • the quiet waters of a lagoon
   • a lake of tranquil blue water reflecting a tranquil blue sky
   • a smooth channel crossing
   • scarcely a ripple on the still water
   • unruffled water
6. of the sun; characterized by a low level of surface phenomena like sun spots e.g.

adv.

1. with little or no activity or no agitation (`quiet' is a nonstandard variant for `quietly');
   quietly
   
   • her hands rested quietly in her lap
   • the rock star was quietly led out the back door
   • sit here as quiet as you can