Merriam-Webster's Collegiate® Dictionary, 11th Edition
QUIET
I. noun see: while
Date: 14th century
the quality or state of being quiet ; tranquillity ,
II. adjective
Etymology: Middle English, from Middle French quiete, from Latin quietus, from past participle of quiescere
Date: 14th century
1. marked by little or no motion or activity ; calm , gentle , easygoing , not interfered with , enjoyed in peace and relaxation ,
2. free from noise or uproar ; still , unobtrusive , conservative , secluded , quietly adverb quietness noun
III. adverb
Date: 1573
in a quiet manner ,
IV. verb
Etymology: Middle English, from Late Latin quietare to set free, to calm, from Latin quietus
Date: 14th century
transitive verb to cause to be quiet ; calm , to make secure by freeing from dispute or question , intransitive verb to become quiet, quieter noun