DictionarynerdIntensely focused enthusiast
noun

nerd

NERD/nɜːrd/

A person deeply absorbed in a specialized interest, often seen as intellectual or socially awkward.

The electronics nerd studies the circuit board with absorbed attention.

An older technology enthusiast studies an exposed circuit board with absorbed concentration, comparing its components with a simple unlettered circuit sketch beside an open laptop.
Etymology

Nerd began as student slang for a socially awkward person, later overlapping with geek for studious or technology-focused people. It probably comes from slang nert, “stupid or crazy person,” but that ancestry is uncertain.

In context

TED5:24
I would definitely call myself a decomposition nerd
When I die, recompose me | Katrina Spade

More examples

  • She proudly calls herself a history nerd.
  • Several science nerds formed a weekend club.
  • He disliked being dismissed as a nerd because he loved mathematics.

Forms

nerd · nerds

Similar words

enthusiast
Focuses on strong interest without implying awkwardness.
geek
Geek is similarly informal and often emphasizes technical or specialized interests.