1.past times (especially in the phrase `in days of old')
2.(used especially of persons) having lived for a relatively long time or attained a specific age; especially not young; often used as a combining form to indicate an age as specified as in `a week-old baby';
an old man's eagle mind--William Butler Yeats
3.of long duration; not new;
old tradition
4.of an earlier time;
his old classmates
5.(used for emphasis) very familiar;
good old boy
6.lacking originality or spontaneity; no longer new;
moth-eaten theories about race
7.just preceding something else in time or order;
the previous owner
8.old in experience;
an old offender
9.used informally especially for emphasis;
a real honest-to-god live cowboy