Definition of incognito

• a. / adv. - Without being known; in disguise; in an assumed character, or under an assumed title; -- said esp. of great personages who sometimes adopt a disguise or an assumed character in order to avoid notice.
• a. - One unknown or in disguise, or under an assumed character or name.
• a. - The assumption of disguise or of a feigned character; the state of being in disguise or not recognized.