might1
  
  modal v.
 (3rd sing. present might)
 past of 
may1.   
- used in reported speech to express possibility or permission. 
▸expressing a possibility based on an unfulfilled condition.
 ▸expressing annoyance:
 you might have told me!
 - used politely or tentatively in questions and requests. 
▸asking for information:
 who might you be?
 - used to express possibility or make a suggestion.
 
 
  Usage
  On the distinction between might and may, see usage at may1.
 
  
    
might2
  
  n.
 great power or strength.
 
  Phrase
  
    
      - with might and main
 with all one's strength or power. 
    
   
  Etymology
  OE miht, mieht, of Gmc origin; rel. to may1.