What is the meaning of Sire?

A lord, master, or other person in authority, most commonly used vocatively: formerly in speaking to elders and superiors, later only when addressing a sovereign.

A male animal that has fathered a particular offspring (especially used of domestic animals and/or in biological research).

A father; the head of a family; the husband.

A creator; a maker; an author; an originator.

To father; to beget.

adorn

endow with a favorable quality

sire (term of respect) (Still used in at least partly French-speaking kingdoms such as Belgium or Canada as a form of address to the sovereign)

lord

king, monarch

Used preceding the name or title of a knight, noble, or cleric.

A respectful term of address for a noble or gentleman.

A noble or lord; one of high station.

A husband as the head of a household.

A father as one's progenitor.

nominative singular of sieur

accusative plural of sir

locative singular of siras (head)

vocative singular of sirā (vein)

sire

third-person plural present of siriti

Source: wiktionary.org