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English definition of “parenthesis”

parenthesis

noun [C] uk   /pəˈren.θə.sɪs/ (plural parentheses) us  
a remark that is added to a sentence, often to provide an explanation or extra information, that is separated from the main part of the sentence by commas, brackets, or dashes: The sentence 'Her youngest sister - the one who lives in Australia - is coming over next summer' contains a parenthesis.Remarks and remarkingExpressing and asking opinions in parenthesis If, while you are talking, you say something in parenthesis, you say it as something extra and then continue with the main part of the sentence: Of his origins he said very little, merely mentioning in parenthesis that his background was poor.Remarks and remarkingExpressing and asking opinions
(Definition of parenthesis from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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