old

adjective18

1. •
   (of a thing, an idea or a relationship) having existed for a long time

   • an old abandoned building
2. •
   Of a living being, having lived for most of the expected years.
3. •
   Of a perishable item, having existed for most of, or more than, its shelf life.
4. •
   Of a species or language, belonging to a lineage that is distantly related to others.

   • the ginkgo is one of the oldest living trees
   • Basque is the oldest language in Europe
5. •
   Having existed or lived for the specified time.

   • How old are they? She’s five years old and he's seven. We also have a young teen and a two-year-old child.
   • My great-grandfather lived to be a hundred and one years old.
6. •
   Of an earlier time.
7. •
   Former, previous.

   • My new car is not as good as my old one.
8. •
   That is no longer in existence.

   • The footpath follows the route of an old railway line.
9. •
   Obsolete; out-of-date.

   • That is the old way of doing things; now we do it this way.
10. •
    (UK) Being a graduate or alumnus of a school, especially a public school.
11. •
    Having been used and thus no longer new or unused.

    • I find that an old toothbrush is good to clean the keyboard with.
12. •
    Familiar.

    • When he got drunk and quarrelsome they just gave him the old heave-ho.
    • She always makes the same old excuses.
13. •
    A grammatical intensifier, often used in describing something positive, and combined with another adjective.

    • We're having a good old time.
    • My next car will be a big old SUV.
14. •
    (informal) Indicating affection and familiarity.

    • Finally, when they were all done slobbering around, old Sally introduced us. — 1951
15. •
    Tiresome after prolonged repetition.

    • Your constant pestering is getting old.
16. •
    Designed for a mature audience; unsuitable for children below a certain age.

    • Monsieur's story is too old for our Juvenile Magazine. — 1868
17. •
    Said of subdued colors, particularly reds, pinks and oranges, as if they had faded over time.
18. •
    (no longer used) Excessive, abundant.

    • URSULA: Madam, you must come to your uncle. Yonder's old coil at home: it is proved, my Lady Hero hath been falsely accused, the prince and Claudio mightily abused — 1598

noun4

1. •
   [plural only] People who are old; old beings; the older generation, taken as a group.

   • A civilised society should always look after the old in the community.
2. •
   (slang) A person older than oneself, especially an adult in relation to a teenager.

   • I'm not letting an old wreck my good time today.
   • I'm not letting any olds wreck my good time today.
3. •
   (slang) One's parents.

   • I had to sneak out to meet my girlfriend and tell the olds I was going to the library.
4. •
   (Australia) A typically dark-coloured lager brewed by the traditional top-fermentation method.

   • We crossed to the pub on the corner of Carlisle Street and I ordered two schooners of old for him and one of light for me. — 2010

noun2

1. •
   (Internet) Abbreviation of online dating.
2. •
   Abbreviation of obsessive love disorder