Source : Webster's Revised Unabridged Dictionary (1913)

Squire \Squire\, n. [OF. esquierre, F. ['e]querre. See {Square},
   n.]
   A square; a measure; a rule. [Obs.] ``With golden squire.''
   --Spenser.

Squire \Squire\, n. [Aphetic form of esquire.]
   1. A shield-bearer or armor-bearer who attended a knight.

   2. A title of dignity next in degree below knight, and above
      gentleman. See {Esquire}. [Eng.] ``His privy knights and
      squires.'' --Chaucer.

   3. A male attendant on a great personage; also (Colloq.), a
      devoted attendant or follower of a lady; a beau.

   4. A title of office and courtesy. See under {Esquire}.

Squire \Squire\, v. t. [imp. & p. p. {squired}; p. pr. & vb. n.
   {squiring}.]
   1. To attend as a squire. --Chaucer.

   2. To attend as a beau, or gallant, for aid and protection;
      as, to squire a lady. [Colloq.] --Goldsmith.

Source : WordNet®

squire
     n 1: young nobleman attendant on a knight
     2: an English country landowner
     3: a man who attends or escorts a woman [syn: {gallant}]
     v : attend upon as a squire; serve as a squire