noun

lack of knowledge or information.

he acted in ignorance of basic procedures

incomprehension,unawareness,unconsciousness,inexperience,innocence,unfamiliarity with,lack of enlightenment about,lack of knowledge about,lack of information about,cluelessness,nescience,lack of knowledge,lack of education,unenlightenment,benightedness,lack of intelligence,unintelligence,stupidity,foolishness,idiocy,denseness,brainlessness,mindlessness,slow-wittedness,thickness,dimness,dumbness,dopiness,doziness