/dom/ ; for 2 also Port. /dawonn/ , n.
1. ( sometimes cap. ) a title of a monk in the Benedictine, Carthusian, Cistercian, and certain other monastic orders.
2. ( usually cap. ) a Portuguese title affixed to a man's given name; Sir: formerly a title of certain dignitaries.
[ 1710-20; short for L dominus lord, master ]