a title of honour, given to those who are noble, either by birth or creation; in this sense it amounts to much the same as peer of the realm, or lord of Parliament. This title is, by courtesy, also given to all the sons of dukes and marquises, and to the eldest sons of earls; and it is also a title of honour bestowed on those who are honourable by their employments, as lord advocate, lord chamberlain, lord chancellor, &c.