As a noun investigation
As a proper noun ignorance is
a personification of ignorance.
The act of investigating; the process of inquiring into or following up; research; study; inquiry, especially patient or thorough inquiry or examination; as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist.
The condition of being uninformed or uneducated. Lack of knowledge or information.
* willful ignorance
* ignorance is bliss