past in WordNet English dictionary

1. so as to pass a given point
   "every hour a train goes past"
   by  past  by  past 
   

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

1. earlier than the present time; no longer current
   "time past"; "his youth is past"; "this past Thursday"; "the past year"
   past 
   
2. of a person who has held and relinquished a position or office
   "a retiring member of the board"
   past  preceding  retiring