Definition of priceless adjective from the Oxford Advanced American Dictionary

     

    priceless

     adjective
    adjective
    NAmE//ˈpraɪsləs//
     
     
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  1. 1extremely valuable or important a priceless collection of antiques priceless information Our family photos are priceless. Thesaurusvaluableprecious priceless irreplaceableThese words all describe something that is worth a lot of money or is very important to someone.valuable worth a lot of money:The thieves took three pieces of valuable jewelry.precious rare and worth a lot of money; loved or valued very much:a precious Chinese vase, valued at half a million dollars precious memories of our time togetherpriceless extremely valuable; loved or valued very much:a priceless collection of antiquesirreplaceable too valuable or special to be replacedPatterns valuable/precious/priceless/irreplaceable possessions valuable/precious/priceless antiques/jewels/jewelry
  2. 2(informal) extremely amusing You should have seen his face—it was priceless!
See the Oxford Advanced Learner's Dictionary entry: priceless