DuckCorp Dico

Found one definition

1.                 From en.wiktionary.org:
                   
   
   
                   
                     
   [deadset]
   
   ** English
   
   *** Alternative forms
   
    - [en]
   *** Noun
   [en-noun]
   
    1. [en]  The rigid pose a hunting dog assumes when pointing out game to a hunter.
    2. A fixed or stationary condition arising from obstacle or hindrance; a deadlock .
    3. [en]  A determined effort.
    4. A pointed and persistent attack on a person.
    5. * {{ quote-text | en | year=2018 | author=Frank O'Connor | title=The Big Fellow: Michael Collins and the Irish Revolution
   |passage=The result was that everyone made a DEAD SET on Collins.  It was the
   same in conversation.  When he put his head in everyone turned on him.  He was
   roared down unmercifully, with the inevitable result that he lost his
   temper.}}
   
   *** Adjective
   [en-adj]
   
    1. Unswervingly  dedicated ; resolutely  determined .
    2. * [en]
    3. [en]  Complete and utter; total.
   *** Anagrams
   
    - [en]