First-born. n.s. [first and born.] Eldest; the first by the order of nativity.
Last, with one midnight stroke, all the first-born
Of Egypt must lie dead. Milton's Paradise Lost, b. xii.
Hail, holy light, offspring of heav'n first-born! Milton.
The first-born has not a sole or peculiar right, by any law of God and nature; the younger children having an equal title with him. Locke.