Definition of roast:
(v) :
to cook food by heating in an oven or over fire without covering, resulting in a crisp, possibly even slightly charred appearance to the food; to admonish someone vigorously
"i'm late home for the fourth time this week; my boyfriend will really roast me this time."
(adj) :
having been cooked by roasting
(n) :
a cut of meat suited to roasting; a roast meal