If you're rested, you're wide awake after a good night's sleep. Rested students tend to score better on tests than those who stayed up too late the night before.

If you were choosing the pilot to fly your airplane or the surgeon in charge of a relative's operation, you'd pick rested people, who are refreshed by plenty of sleep and are wide awake and prepared to do their jobs well. Someone who's rested is alert and invigorated, as opposed to a tired or fatigued person. The Old English root is ræste, "sleep, bed, or mental peace."

Definitions of rested

adj not tired; refreshed as by sleeping or relaxing

“came back rested from her vacation”
full of life and energy
fresh, invigorated, refreshed, reinvigorated
with restored energy
untired, unwearied, unweary
with unreduced energy
depleted of strength or energy
all in, beat, bushed, dead
very tired
aweary, weary
physically and mentally fatigued
blear, blear-eyed, bleary, bleary-eyed
tired to the point of exhaustion
bored, world-weary
tired of the world
burned-out, burnt-out
exhausted as a result of longtime stress
careworn, drawn, haggard, raddled, worn
showing the wearing effects of overwork or care or suffering
drooping, flagging
weak from exhaustion
dog-tired, exhausted, fagged, fatigued, played out, spent, washed-out, worn out, worn-out
drained of energy or effectiveness; extremely tired; completely exhausted
having sore or tired feet
jaded, wearied
drained, knackered
very tired
worn out from stress or strain
tired by travel
unrefreshed, unrested
not rested or refreshed;
(British informal) exhausted or worn out
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