years (Noun) — A late time of life. ex. "he's showing his years"
years (Noun) — A prolonged period of time. ex. "I haven't been there for years and years"
years (Noun) — The time during which someone's life continues. ex. "in his final years"
years (Noun) — A period of time containing 365 (or 366) days. ex. "she is 4 years old" ex. "in the year 1920"
years (Noun) — A period of time occupying a regular part of a calendar year that is used for some particular activity. ex. "a school year"
years (Noun) — The period of time that it takes for a planet (as, e.g., Earth or Mars) to make a complete revolution around the sun. ex. "a Martian year takes 687 of our days"
years (Noun) — A body of students who graduate together. ex. "she was in my year at Hoehandle High"