Related Clues:

• Acknowledge
• With a ___ (recognizing)
• Acknowledge, in a way
• Give the O.K.
• Greet from afar
• Give the ___ (pick)
• Greet, in a way
• Acknowledge tacitly
• Signal agreement, in a way
• Acknowledge with a head gesture
• Greet silently
• Signal, perhaps
• Bob one's head at
• Acknowledge silently
• Give a nonverbal 'OK'