Meaning

2 senses
  1. (not comparable)Born as the third child to parent or family.

    Mary, the thirdborn Bennett child in the novel Pride and Prejudice, receives the least attention.

  2. (not comparable)Third of a particular type to be born to a parent or family.

    Prince Arthur was Queen Victoria's thirdborn son and her seventh child overall.

Origin

From third + born.

From third + born.

Wiktionary, CC BY-SA 4.0 · source

See also

neighbours in the dictionary
thirdborn — meaning, examples, forms, synonyms | Krumeto