1. (Used especially of persons) Having lived for a relatively long time or attained a specific age; especially not young; SYN. aged.
2. Lacking originality or spontaneity; no longer new; SYN. stale, moth-eaten.
3. From an earlier time
4. Of long duration; not new
5. Old in experience; SYN. older.
6. (Used for emphasis) Very familiar
ETYM Latin senilis, from senex, gen. senis, old, an old man: cf. French sénile. Related to Senior.
1. Of or pertaining to old age.
2. Exhibiting diminished mental powers, due to old age.