"oldest" in the adjective sense

1. old

used especially of persons) having lived for a relatively long time or attained a specific age

"his mother is very old"

"a ripe old age"

"how old are you?"

2. old

of long duration not new

"old tradition"

"old house"

"old wine"

"old country"

"old friendships"

"old money"

3. old

used for emphasis) very familiar

"good old boy"

"same old story"

4. old, older

skilled through long experience

"an old offender"

"the older soldiers"

5. erstwhile, former, old, onetime, one-time, quondam, sometime

belonging to some prior time

"erstwhile friend"

"our former glory"

"the once capital of the state"

"her quondam lover"

6. bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, not bad, peachy, slap-up, swell, smashing, old

very good

"he did a bully job"

"a neat sports car"

"had a great time at the party"

"you look simply smashing"

"we had a grand old time"

7. Old

of a very early stage in development

"Old English is also called Anglo Saxon"

"Old High German is High German from the middle of the 9th to the end of the 11th century"

8. previous, old

just preceding something else in time or order

"the previous owner"

"my old house was larger"

Source: WordNet® (An amazing lexical database of English)

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