Definition, synonyms and related words
plural of senior
"The college seniors gathered outside the library to say their final goodbyes before graduation."
In plain English: Seniors are older people who have graduated from high school and are usually in their twenties, thirties, or beyond.
"The seniors at the school organized a dance for everyone to attend."
Derived from Latin senior, the comparative form of senex meaning "old man," it originally denoted an elder or older person in relation to another. In modern usage, it refers specifically to students who have completed most of their coursework at a university or high school before graduation.