post‧sea‧son /ˈpəʊstˌsiːzən◂ $ ˈpoʊst-/ 
 adjective [only before noun] American English relating to the time after the usual sports season is over
 Antonym : preseason: 
 a postseason game—postseason noun [singular]
 a postseason game—postseason noun [singular]  [TahlilGaran] Dictionary of Contemporary English ▲