What is the meaning of Nerd?

A person who is intellectual but generally introverted.

One who has an intense, obsessive interest in something.

A member of a subculture revolving around intellectualism, technology, video games, fantasy and science fiction, comic books and assorted media.

One who is stupid and socially inept or unattractive; a social outcast.

nerd

a nerd

a nerd

nerd (intellectual, skillful person, generally introverted)

nerd (intellectual, introverted and quirky person)

nerdy (who is a nerd)

nerd

Source: wiktionary.org