1. The state, condition, or right of being the firstborn child, especially the eldest son.
Usage: Usually used in historical or legal contexts; Often refers to inheritance rights in feudal or aristocratic systems
2. A system of inheritance in which the entire estate passes to the firstborn child, typically the eldest son.
Usage: Historical; common in European feudal and aristocratic societies

Examples

• Under the law of primogeniture, the eldest son inherited the entire family estate.
• The system of primogenitures ensured that noble titles and lands remained undivided.
• Medieval European kingdoms relied heavily on primogenitures to maintain political stability.
• The abolition of primogenitures allowed daughters to inherit property equally with sons.
• Primogenitures were designed to prevent the fragmentation of large estates across multiple heirs.
• The protagonist's younger brother resented the primogeniture that favored his older sibling.