What is the definition of the word senior?

Answer 1

Someone who is older than other people is said to be their senior. Also, a person who has been working at a job longer than others is 'senior' to them, or occupies a senior position in the company.

Answer 2

Senior typically refers to someone of higher rank, status, or age within a particular group or organization. It can also refer to the final year of schooling, or the last level of a position within a company or profession.