mis ‧ ter /ˈmɪstə $ -ər/ BrE AmE noun
[ Date: 1500-1600 ; Origin: master ]
1 . Mister the full form of ↑ Mr
► In people’s names, Mister is always written Mr .
2 . spoken especially American English used to address a man whose name you do not know:
Thanks, mister.