1. (noun) the offspring who came first in the order of birth

• firstborn

2. (adjective) first in order of birth

• firstborn

1. (adjective) first in order of birth

• first

1. (noun) the offspring who came first in the order of birth

• issue
• offspring
• progeny

1. (noun) the offspring who came first in the order of birth

• firstborn
• firstborn

2. (adjective) first in order of birth

• firstborn
• firstborn