Definitions

1. adjective

being of higher rank or position, especially in a school or university

“She was a senior in high school and was elected class president.”

2. noun

a person of higher rank or position, especially in a school or university

“The senior in our group led us through the project.”

3. noun

a person who has reached the age of 60 or older, especially one who is entitled to benefits or discounts

“The senior discount applied to all citizens aged 60 or above.”

4. noun

a person who has a certain amount of experience or seniority in a job or profession

“The senior lawyer in the firm handled the case.”

5. verb

to become or make someone a senior, especially in a school or university

“She will be senior next year after completing her studies.”