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English definition of “nerd”

nerd

noun [C]     /nɜːd/ US  /nɝːd/ informal disapproving
a person , especially a man, who is not attractive and is awkward or socially embarrassing : He was a real nerd in high school - I can't believe he's so handsome now.Inability and awkwardness a person who is extremely interested in one subject , especially computers , and knows a lot of facts about it: I'm a real grammar nerd. nerdy     /ˈnɜː.di/ US  /ˈnɝː-/ adjective informal disapproving He's nice , but kind of nerdy. These glasses make me look / feel nerdy.Inability and awkwardness
(Definition of nerd noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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