Section 44 Indian Penal Code: An injury is any harm whatever illegally caused to any person in body, mind, reputation and property.
Medical Definition: A wound or injury is break in continuation of any of the tissues of living body.
Mechanical Injury or wounds are injury produced by physical violence.
Trauma: Injury or wound produced in living body by application of external force or violence.
Classification : Injury can be classified under three main categories-
A.Medical
1.Physical or Mechanical
a) Due to blunt force
Abrasions
Contusions
Lacerations
Fractures & dislocations
b) Due to Sharp force
Incised wounds
Chop wounds
Stab wounds
c) Due to Firearms
Firearm wounds
Blast injuries.
2.Thermal
a) Due to cold
Frostbite
Immersion foot
Trench foot
b) Due to heat
Burns
Scalds
3.Chemical
corrosive acid
corrosive alkalis
4.Explosion
caused by explosion of boiler or pressure vessels in industries
5.Miscellaneous
electricity
lightening
X-rays
Radioactive substances
B.Legal
Simple
Grievous
Dangerous
C.Medicolegal
Suicide
Homicide
Accident
Fabricated
Self inflicted
Defense
Antemortem
Postmortem