Source : Webster's Revised Unabridged Dictionary (1913)

Squirarchy \Squir"arch*y\, n. [Squire + -archy.]
   The gentlemen, or gentry, of a country, collectively.
   [Written also {squirearchy}.]

Source : WordNet®

squirearchy
     n : the gentry who own land (considered as a class) [syn: {landed
         gentry}]