Definition of "Old" :

noun: past times (especially in the phrase in days of old')

adjective: just preceding something else in time or order

"My old house was larger."

adjective: of a very early stage in development

"Old English is also called Anglo Saxon."

adjective: skilled through long experience

"An old offender."

adjective: (used for emphasis) very familiar

"Good old boy."

adjective: very good

"We had a grand old time."

adjective: of long duration; not new

"Old tradition."

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

"His mother is very old."

adjective: belonging to some prior time