Any person, usually an elderly individual, whose facial creases create the shape of parenthesis on either side of their lips.
These "parenthesis" run from the base of one's nostrils to the chin line, placing one's mouth within a set of parentheses.
It is a very unattractive feature, and usually causes one to appear puppet-like, with the chin and lower lip creating the lower part of a puppet's mouth.
Usually obnoxious, rude, obtrusively religious ex-English, now-substitute (sometimes single-school exclusive) teachers possess such a trait.
That parenthesis face really said "God bless you and save you" when I sneezed!
I can't believe she doesn't know how to look through her glasses instead of over them!