Definition of regular expression in English:

regular expression

Line breaks: regu|lar ex|pres¦sion

Entry from British & World English dictionary

noun

Computing
A sequence of symbols and characters expressing a string or pattern to be searched for within a longer piece of text.

Definition of regular expression in:

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Word of the day vituperate
Pronunciation: vɪˈtjuːpəreɪt
verb
blame or insult (someone) in strong language...