1. 
[syn: deference, respect, respectfulness]
The Collaborative International Dictionary of English v.0.48:
Respectful \Re*spect"ful\ (-f?l), a.
   Marked or characterized by respect; as, respectful
   deportment.
   [1913 Webster]
         With humble joy and with respectful fear. --Prior.
   [1913 Webster] -- Re*spect"ful*ly, adv. --
   Re*spect"ful*ness, n.
   [1913 Webster]
WordNet (r) 3.0 (2006):
respectfulness
    n 1: courteous regard for people's feelings; "in deference to
         your wishes"; "out of respect for his privacy" [syn:
         deference, respect, respectfulness]