A man of noble rank in a monarchy. Historically, lords governed land for the king under the feudal system, and thus served to provide for the
people. Now, the title is just ceremonial, a figurehead.
All the same, "lord" (or "lady") can refer to somebody who is very skilled at something.
The
female counterpart of a lord is a lady, being either the
wife of a lord or a woman who holds the position of a lord in her own right.