HI SIGN? Crossword Clue

We know 2 solutions for: HI SIGN?
Crossword Puzzle Infos
The term 'HI SIGN?' is a common greeting that can be answered in two ways. The first way is to wave, which is a four letter word. The second way is to NOD, which is a three letter word. Both of these actions are used to show recognition and acknowledgement of another person.
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