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.
In other
European languages, the
equivalent to "lord" is used as the form of address for men; Dominus, Signore, Señor, Monsieur, Herr, etc.