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English definition of “underscore”

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underscore

verb [T] uk   /ˌʌn.dəˈskɔːr/ us    /-dɚˈskɔːr/
to underline

underscore

noun [C or U] uk   /ˈʌn.də.skɔːr/ us    /-dɚ.skɔːr/
the character _ on a computer keyboard, used to draw a line under a letter or word, and also used in file names where a space is not allowed
(Definition of underscore from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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