1. stet - Noun
2. stet - Verb
Let it stand; -- a word used by proof readers to signify that something once erased, or marked for omission, is to remain.
To cause or direct to remain after having been marked for omission; to mark with the word stet, or with a series of dots below or beside the matter; as, the proof reader stetted a deled footnote.
Source: Webster's dictionary