Lord  —n. 1 master or ruler. 2 hist. Feudal superior, esp. Of a manor. 3 peer of the realm or person with the title lord. 4 (lord) (often prec. By the) god or christ. 5 (lord) a prefixed as the designation of a marquis, earl, viscount, or baron, or (to the christian name) of the younger son of a duke or marquis. B (the lords) = *house of lords. —int. (lord, good lord, etc.) Expressing surprise, dismay, etc.  lord it over domineer. [old english, = bread-keeper: related to *loaf1, *ward]