de ‧ port ‧ ment /dɪˈpɔːtmənt $ -ɔːr-/ BrE AmE noun [uncountable]
[ Date: 1600-1700 ; Language: French ; Origin: déportement , from Old French deporter 'to behave' , from Latin portare 'to carry' ]
1 . British English the way that someone stands and walks:
lessons in manners and deportment
2 . old-fashioned especially American English the way that someone behaves in public