Adjective past has 3 senses
  1. past - earlier than the present time; no longer current; "time past"; "his youth is past"; "this past Thursday"; "the past year"
    Antonyms:
    present, existing, immediate, instant, inst, latter-day, future, approaching, forthcoming, upcoming, coming, future day, early, in store, prospective, proximo, prox, emerging, rising
  2. past, preceding, retiring - of a person who has held and relinquished a position or office; "a retiring member of the board"
    Antonym: incoming (indirect, via outgoing)
  3. past - a verb tense or other construction referring to events or states that existed at some previous time; "past participle"
,Adverbial past has 1 sense
  1. by, past - so as to pass a given point; "every hour a train goes past"
,Noun past has 3 senses
  1. past, past times, yesteryear, yore - the time that has elapsed; "forget the past"
    --1 is a kind of time
    Antonyms: future, hereafter, futurity, time to come
    --1 has particulars:
     bygone, water under the bridge; old; history; time immemorial, time out of mind; auld langsyne, langsyne, old times, the good old days; yesterday
  2. past - a earlier period in someone's life (especially one that they have reason to keep secret); "reporters dug into the candidate's past"
    --2 is a kind of
    time period, period of time, period
    --2 is a part of life
  3. past, past tense - a verb tense that expresses actions or states in the past
    --3 is a kind of tense
    --3 has particulars: preterit, preterite
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