It would seem that there is no proper international definition of Terrorism, however Dictionary.com has it defined as:
Quote:
|
The unlawful use or threatened use of force or violence by a person or an organized group against people or property with the intention of intimidating or coercing societies or governments, often for ideological or political reasons.
|
Unlawful use of violence by a person - Crashing a plane is pretty violent
Against people or property - IRS office
Intention of intimidating or coercing societies or governments - Well, he didn't do it for lols, that's for certain.
http://en.wikipedia.org/wiki/Definition_of_terrorism