past past /ˈpæst/

adjective

1. () Earlier than the present time; no longer current  ( past )
   earlier than the present time; no longer current
    Time past
   time past
    His youth is past
   his youth is past
    This past Thursday
   this past Thursday
    The past year
   the past year
   
2. () Of a person who has held and relinquished a position or office  ( preceding , retiring , past )
   of a person who has held and relinquished a position or office
    A retiring member of the board
   a retiring member of the board
   

adverb

1. () So as to pass a given point  ( by , past )
   so as to pass a given point
    Every hour a train goes past
   every hour a train goes past
   

noun

1. () The time that has elapsed  ( past times , yesteryear , past )
   the time that has elapsed
    Forget the past
   forget the past
   
2. () A earlier period in someone's life (especially one that they have reason to keep secret)  ( past )
   a earlier period in someone's life (especially one that they have reason to keep secret)
    Reporters dug into the candidate's past
   reporters dug into the candidate's past
   
3. () A verb tense that expresses actions or states in the past  ( past tense , past )
   a verb tense that expresses actions or states in the past
   

preposition

1. () After a specified point in time.  ( gone [British] , past )
   After a specified point in time.