Definition of rests:
(n) :
(uncountable, of a person or animal) Relief from work or activity by sleeping; sleep.
(n) :
(countable) Any relief from exertion; a state of quiet and relaxation.
(n) :
(uncountable) Peace; freedom from worry, anxiety, annoyances; tranquility.
(n) :
(uncountable, of an object or concept) A state of inactivity; a state of little or no motion; a state of completion.
(n) :
(euphemistic, uncountable) A final position after death. Also, death itself: "Not alone, not alone would I go to my rest in the heart of the love..." -- George William Russell ("Love")
(n) :
(music, countable) A pause of a specified length in a piece of music.