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"plus" is also used as a crossword clue. If that's what you saw, the answer is often and (3 letters).
Definitions
involving advantage or good
Word origin
Borrowed from Latin plūs (“more”).
Used in a sentence
“Two plus two equals four.”
“A water molecule is made up of two hydrogen atoms plus one of oxygen.”
“I've won a holiday to France plus five hundred euros in spending money!”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Addition or bonus”4 letters
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