1. plural of lastborn; the youngest child in a family
Usage: countable noun; often used in psychology and family studies contexts

Examples

• Lastborns in large families often develop strong social skills.
• Research suggests that lastborns may have different personality traits than their older siblings.
• The study compared firstborns and lastborns across multiple age groups.
• Many lastborns report feeling less pressure than their older brothers and sisters.
• Psychologists have long been interested in how birth order affects lastborns.