: knowledgeable of something especially through personal experience; also:mindful
See cognizant defined for English-language learners
Examples of COGNIZANT
He is cognizant of his duties as a father.
<not fully cognizant of the details of the trade agreement>
Not like some college kid beaming in blissful ignorance, but rather like a worldly 23-year-old, self-aware and fully cognizant of the dire straits he's entering. —Jody Berger, ESPN, 14 June 1999
… to assure you that I am neither privy to, nor cognizant of, any such clique; and that I most potently disbelieve in the existence of any such. —Abraham Lincoln, letter, 13 Oct. 1849
… the idea of a machine cognizant of that human Achilles' heel, emotion, can conjure more sinister images—like HAL, the savvy, menacing computer in “2001,” whose fear that he would be unplugged led him to kill all but one of the crew members on a space mission. —Daniel Goleman, New York Times, 7 Jan. 1997