Baron n. : A title or degree of nobility; originally, the possessor of a fief, who had feudal tenants under him; in modern times, in France and Germany, a nobleman next in rank below a count; in England, a nobleman of the lowest grade in the House of Lords, being next below a viscount.

Baron n. : A husband; as, baron and feme, husband and wife.

Example:
How can I use my Beech Baron 55 to make money?

Taxonomy
baron, rank, barony, Baroness, nobility, English baron, coronet, Lady, feudal barons, feudal baron, sovereign, Edinburgh, peerage, Lord, own right, Scottish, The Right Honourable, relative rank.

Defination from the web:
Baron is a title of nobility. ... A baron may hold a barony (plural baronies), if the title relates originally to a feudal barony by tenure, although such ... William I introduced "baron" as a rank in England to distinguish the men who had pledged their loyalty to him (see Feudalism) ...