autodidacticism

[ aw-toh-dahy-dak-tuh-siz-uh m ]
/ ˌɔ toʊ daɪˈdæk təˌsɪz əm /

noun

the process or practice of learning a subject without a teacher or formal education; self-education: Abraham Lincoln is viewed as a model of autodidacticism.

Origin of autodidacticism