Definitions

1. noun

A young person, especially a boy or a young man.

“As a youngster, he was very curious and loved to explore the woods.”

2. noun

A young animal, especially one that is just beginning to grow or develop.

“The zookeeper was particularly fond of the playful youngsters in the primate enclosure.”

3. adjective

Characteristic of or typical of a young person.

“The youngster’s energy and enthusiasm were inspiring to everyone around him.”