Conveying
thoughts and/or
feelings without using
words. The term usually indicates use of
body language or
sounds as the medium, though there are many other forms of nonverbal communication.
It's good to distinguish between intentional and unintentional within this category. There's a big difference between cleverly indicating to your spouse that you want to leave a party ASAP while you praise the host's dress and yawning while you accept another cocktail.