Autodidact (noun)

A person who has taught themselves a particular skill or subject, rather than having learned it through formal instruction.

Origin:

Late 18th century: from french autodidacte, from greek autodidaktos "self-taught", from aut- "self" + didaktos "taught".

Examples:

1. An autodidact is a self-taught person.
2. Many famous figures such as Albert Einstein, Benjamin Franklin, and Mark Twain were autodidacts.
3. The term autodidact is often used to refer to someone who has taught themselves a subject without the guidance of a teacher or instructor.
4. An autodidact may pursue self-education through reading, observation, or independent study.
5. An autodidact is not limited by formal education, and can be found in many fields including science, arts, and literature.