Gives a silent 'OK'
Else clues• Acknowledges briefly
• Acknowledges in passing
• Acknowledges nonverbally
• Acknowledges with a head tilt
• Acknowledges wordlessly
• Acknowledges wordlessly, in a way
• Acknowledges, in a way
• Gives a passing acknowledgment
• Gives a silent 'OK'
• Greets nonverbally
• Greets silently
• Greets without speaking
• Greets, in a way
• Signals
• Signals, as to an auctioneer
• Signals, in a way
• Acknowledges briefly
• Acknowledges in passing
• Acknowledges nonverbally
• Acknowledges with a head tilt
• Acknowledges wordlessly
• Acknowledges wordlessly, in a way
• Acknowledges, in a way
• Gives a passing acknowledgment
• Greets nonverbally
• Greets silently
• Greets without speaking
• Greets, in a way
• Signals
• Signals, as to an auctioneer
• Signals, in a way