1. A person who has recently arrived in a place or joined a group
She is a newcomer to the city and is still getting to know the neighborhoods.
Ela é uma recém-chegada à cidade e ainda está conhecendo os bairros.
2. A person who is new to a particular activity, skill, or field
As a newcomer to programming, he found the course challenging but rewarding.
Como iniciante em programação, ele achou o curso desafiador mas gratificante.