old (Adjective) — (used especially of persons) having lived for a relatively long time or attained a specific age. ex. "his mother is very old" ex. "a ripe old age" ex. "how old are you?"
old (Adjective) — Of long duration; not new. ex. "old tradition" ex. "old house" ex. "old wine" ex. "old country" ex. "old friendships" ex. "old money"
old (Adjective) — (used for emphasis) very familiar. ex. "good old boy" ex. "same old story"
old (Adjective) — Skilled through long experience. ex. "an old offender" ex. "the older soldiers"
old (Adjective) — Belonging to some prior time. ex. "old friend"
old (Adjective) — (used informally especially for emphasis) authentic and real. ex. "had us a high old time"
old (Adjective) — Just preceding something else in time or order. ex. "my old house was larger"
old (Adjective) — No longer valid or fashionable. ex. "old equipment"
old (Adjective) — (linguistics) of a very early stage in development. ex. "Old English is also called Anglo Saxon" ex. "Old High German is High German from the middle of the 9th to the end of the 11th century"
old (Noun) — Past times (especially in the phrase 'in days of old').