If al in «al-amir» is generic in «Zaydun al-amir», what force may result?

Indefiniteness, Specification and Definiteness of the Predicate

• Identifying a previously known emir without restriction
• Attributing emirship to ʿAmr instead of Zayd
• Restricting the category of emirship to Zayd
• Simply describing Zayd as an emir without exclusivity