1a : of, relating to, or expressed in a parenthesis a parenthetical remark/comment/note One sentence runs on for nearly two pages; other sentences meander through the potholes of so many parenthetical expressions as to make it nearly impossible to follow the trail of the argument …— James Q.

What is an example of a parenthetical?

The definition of parenthetical is enclosed in parenthesis. An example of a parenthetical phrase is the last part of the sentence: "I bought ice cream last night (and it was really good!)." ... A word or phrase within parentheses.

What is a parenthetical sentence?

A parenthetical expression is a word or words added to a sentence without changing the meaning or grammar of the original sentence. ... When nonessential information is added parenthetically to a sentence, it is usually separated from the main sentence by commas or other punctuation.