1. a person who is new to a job, activity, or organization and lacks experience
Usage: informal
2. a first-year player in a professional sport
Usage: sports

1. being new and inexperienced
Usage: informal

Examples

• The rookie police officer was nervous on his first day.
• She made some rookie mistakes during her first week at the company.
• The basketball rookie scored 20 points in his debut game.
• Don’t worry about the error – we all make rookie mistakes when we’re learning.
• The rookie quarterback showed great potential in training camp.
• As a rookie teacher, she spent hours preparing her lessons.
• The rookie driver was still getting used to the race car.