A trauma is defined as an event in which a person's internal and external resources are inadequate to cope with the overwhelming experience. 

Examples (not an exhaustive list):

• Child abuse (emotional, physical, sexual, verbal, neglect)
• Violence (domestic, assault, random acts)
• War
• Rape
• Disease (cancer, HIV, heart disease, paralysis, diabetes)
• Addiction
• Loss of a loved one
• Divorce or break-up in significant relationship
• Natural Disaster (hurricane, earthquake, floods, fire, etc)
• Terrorism
• Financial loss/devastation (job loss, foreclosure, etc)
• Accident (car, injury, fire, etc)
• Physical mutation
• Loss of physical and/or sensory abilities
• Loss of limb(s)

There is no "official" trauma list.  What qualifies an event as a trauma is your response to the experience.