the world > action or operation > behaviour > good behaviour > courtesy > courteous forms of address or title > use courteous title in address [verb (intransitive)] (2)
to have (also carry) an M under one's girdlec1454
Of various English words. In later use usually in form M (usually without point). In general use, and as a conventional title of address or…
sir1798
intransitive. To use the term ‘sir’ in addressing a person.