old is the dictionary form of Old's Definition of old
old has definitions from the field of linguistics
1
[ adjective ] (used especially of persons) having lived for a relatively long time or attained a specific age; especially not young

Examples

"a ripe old age" "how old are you?" often used as a combining form to indicate an age as specified as in "a week-old infant"

2
[ adjective ] of long duration; not new

Examples

"old tradition" "old house" "old wine" "old country" "old friendships" "old money"

3
[ adjective ] of an earlier time

Examples

"his old classmates"

4
[ adjective ] (used for emphasis) very familiar

Examples

"good old boy" "same old story"

5
[ adjective ] lacking originality or spontaneity; no longer new

Synonyms

moth-eaten stale

Examples

"moth-eaten theories about race"

6
[ adjective ] (linguistics) of a very early stage in development

Examples

"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"

7
[ adjective ] old in experience

Synonyms

older

Examples

"an old offender" "the older soldiers"

8
[ adjective ] used informally especially for emphasis

Examples

"a real honest-to-god live cowboy" "had us a high old time" "went upriver to look at a sure-enough fish wheel"

9
[ adjective ] just preceding something else in time or order

Synonyms

previous

Examples

"the previous owner" "my old house was larger"

10
[ noun ] Last name, frequency rank in the U.S. is 12553
11
[ adjective ] used informally especially for emphasis

Examples

"a real honest-to-god live cowboy" "had us a high old time" "went upriver to look at a sure-enough fish wheel"

12
[ noun ] past times (especially in the phrase "in days of old")
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