1)an
intelligent but single-minded person obsessed with a nonsocial hobby or pursuit to an infinite level;
2) an extremely dull and bookish person, usually a male or a group of males;
3)a person who excels at math, science facts, "Star Trek","
Lord of the Rings",
Dungeons and Dragons or other such trivia, and all things internet;
4) Geek in the extreme;
5) nerd to the extreme and infinite;
6) a person who can attract and bore other nerds endlessly.