oldest

adjective older or elder, oldest or eldest

1. having lived or been in existence for a long time; aged
2. of, like, or characteristic of aged people; specif., mature in judgment, wise, etc.
3. of a certain or specified age or duration: a child ten years old
4. made or produced some time ago; not new
5. familiar or known from the past; accustomed: up to his old tricks
6. designating the form of a language in its earliest attested stage: Old English
7. having been in use for a long time; worn out by age or use; shabby
8. that was at one time; former: my old teacher
9. having had long experience or practice: an old hand at this work
10. belonging to the remote past; having existed long ago; ancient: an old civilization
11. dating or continuing from some period long before the present; of long standing: an old tradition
12. designating the earlier or earliest of two or more: the Old World
13. Informal dear: a term of affection or cordiality: old boy
14. Informal tiresome, annoying, etc., esp. as a result of repetition or monotony: their incessant chatter has gotten old
15. Geol. having reached the stage of greatly decreased activity or showing extensive reduction of topographical form: said of streams, mountain ranges, etc.

noun

1. time long past; yore: days of old
2. a person of a specified age: used in hyphenated compounds: a six-year-old
3. something old: with the
4. old people: often with the