/
ɪˈskwʌɪə, 
ɛ-/
n.
  - 
(Esquire)
 Brit. a polite title appended to a man's name when no other title is used, especially in a letter. 
▸N. Amer. a title appended to a lawyer's surname.
 - historical a young nobleman who, in training for knighthood, acted as an attendant to a knight. 
▸an officer in the service of a king or nobleman.
 ▸a landed proprietor or country squire.
 
Etymology
ME: from OFr. esquier, from L. scutarius ‘shield-bearer’, from scutum ‘shield’.