It usually means that they are an expert or knowledgeable in a certain subject such as computers
It can mean someone who is different because their expertise/knowledge in a subject sets them apart.
A 'geek' can be an adult, a child or a teenager. A 'geek' can be male or female.
It's good that they're brainy.
There is nothing wrong with being smart or knowledgeable.
Bill Gates was a geek and look how successful he became.
A geek is someone who shows a great interest (sometimes an obsession) for a particular subject that is often (but not always) technical in nature.
It can some times mean a person who is single-minded or accomplished in technical scientific subjects, but is at the same time thought to be socially inept.
One of the richest men in America is Bill Gates (Microsoft) the alpha geek billionaire.
Once upon a time being described as a geek was seen as an insult Now, however, the term 'geek' has become complimentary or even a badge of honor.
If someone thinks geeks are not cool, they're entitled to their opinion. Others, however, think they are cool.
Many geeks are 'hot' (or 'cool'), watch Mythbusters' Kari, Grant, and Tori.
A geek is someone who has an intense interest in a particular subject/s. He/she engages in active strategizing, thinking and engagement in relation to that subject/s. It is someone who embraces a particular subject/s and spends considerably more time and effort on that than the average person.