senior
n. countable B2 Upper Intermediate Oxford US //ˈsinjɝ// UK //sˈiːnjɐ// se·nior
n. an older person or someone who has a higher rank than you. In sports, it refers to an athlete who plays at the highest level for their age group.
n. an individual of higher rank, longer service, or greater age than another. In a sporting context, it denotes a competitor who has progressed beyond the junior or youth categories.
He is a senior at the local tennis club.
After winning the youth championship, she was finally promoted to the senior team this season.
Transitioning from junior to senior competition requires not only physical development but also a significant shift in mental resilience to face more experienced opponents.
Usage
Often used as a modifier before another noun, such as 'senior management' or 'senior partner'.