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A greeting can consist of an exchange of formal expression, kisses, handshakes.

A greeting can consist of an exchange of formal expression, kisses, handshakes, hugs, and various gestures.

The form of greeting is determined by social etiquette, as well as by the relationship of the people.

Beyond the formal greeting, which may involve a verbal acknowledgment and sometimes a hand shake, facial expression, gestures, body language and eye contact can all signal what type of greeting is expected.

Gestures are the most obvious signal, for instance greeting someone with open arms is generally a sign that a hug is expected.