Definition of perk

• v. t. - To make trim or smart; to straighten up; to erect; to make a jaunty or saucy display of; as, to perk the ears; to perk up one's head.
• v. i. - To exalt one's self; to bear one's self loftily.
• a. - Smart; trim; spruce; jaunty; vain.
• v. i. - To peer; to look inquisitively.