The Collaborative International Dictionary of English v.0.48:

Injury \In"ju*ry\, n.; pl. Injuries. [OE. injurie, L. injuria,
   fr. injurius injurious, wrongful, unjust; pref. in- not +
   jus, juris, right, law, justice: cf. F. injure. See Just,
   a.]
   Any damage or hurt done to a person or thing; detriment to,
   or violation of, the person, character, feelings, rights,
   property, or interests of an individual; that which injures,
   or occasions wrong, loss, damage, or detriment; harm; hurt;
   loss; mischief; wrong; evil; as, his health was impaired by a
   severe injury; slander is an injury to the character.
   [1913 Webster]

         For he that doeth injury shall receive that that he did
         evil.                                    --Wyclif(Col.
                                                  iii. 25).
   [1913 Webster]

         Many times we do injury to a cause by dwelling on
         trifling arguments.                      --I. Watts.
   [1913 Webster]

         Riot ascends above their loftiest towers,
         And injury and outrage.                  --Milton.
   [1913 Webster]

   Note: Injury in morals and jurisprudence is the intentional
         doing of wrong. --Fleming.

   Syn: Harm; hurt; damage; loss; impairment; detriment; wrong;
        evil; injustice.
        [1913 Webster]

WordNet (r) 3.0 (2006):

injury
    n 1: any physical damage to the body caused by violence or
         accident or fracture etc. [syn: injury, hurt, harm,
         trauma]
    2: an accident that results in physical damage or hurt [syn:
       injury, accidental injury]
    3: a casualty to military personnel resulting from combat [syn:
       wound, injury, combat injury]
    4: an act that causes someone or something to receive physical
       damage
    5: wrongdoing that violates another's rights and is unjustly
       inflicted

The Devil's Dictionary (1881-1906):

INJURY, n.  An offense next in degree of enormity to a slight.