The dictionary has also changed the definition of geek to "a person who is very knowledgeable and enthusiastic about a specific subject."
Collins has already added 'geekery', 'geek chic' and 'geekdom' to the dictionary's fold.
While 'geek chic' refers to a fashion style believed to be characteristic of geeks, 'geekery' means preoccupation with, or great knowledge about, a subject, according to the the dictionary.
"For those of us born into a pre-internet world 'geek' meant 'a boring and unattractive social misfit - who tends to smell slightly gamey at close quarters," the dictionary said on its website.
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"Now the meaning has changed again and the new definition will read 'a person who is knowledgeable and enthusiastic about a specific subject'," Collins said on its website.
Last month, Oxford Dictionaries named selfie - "a photograph that one has taken of oneself, typically one taken with a smartphone or webcam and uploaded to a social media website" - as the word of the year.
According to Oxford dictionaries, the word used to be a cruel and critical label attached to clever, but socially awkward, people - such as computer or science geeks.
However, in the 1990s, the computer industry helped many geeks to achieve great success, and the wider perception of geeks began to shift.