1. to insert or enclose (text or information) within parentheses
Usage: British spelling; American English typically uses 'parenthesizes'; third-person singular present tense
2. to make a parenthetical remark or digression
Usage: less common usage

Examples

• The editor parenthesises all uncertain dates in the manuscript.
• She parenthesises her thoughts as she writes, adding clarifications throughout.
• The author parenthesises the translator's notes to distinguish them from the original text.
• He parenthesises his opinions to show they are secondary to the main argument.
• The style guide requires that all citations be parenthesised.
• When she parenthesises a comment, it often becomes the most interesting part of the sentence.