dead set

Short definition from Wiktionary

Noun

1. 1
   The rigid pose a hunting dog assumes when pointing out game to a hunter.
2. 2
   A fixed or stationary condition arising from obstacle or hindrance; a deadlock.
3. 3
   A determined effort.
4. 4
   A pointed and persistent attack on a person.
5. 5
   Alternative spelling of dead set.

Adjective

1. 1
   Unswervingly dedicated; resolutely determined.
2. 2
   Complete and utter; total.
3. 3
   Alternative spelling of dead set.