Angry is an emotion like all emotions, it is mostly defined by the intense feeling to hurt or do something irrational that you would never do normally when you're in you're stable mind, sire.

It is defined by wanting to hurt the person who is making you angry or it is defined by wanting to break the object irrationally that is angering you, sire.

Anger can be explained in many different ways by many different people, while people get angry when they're younger. It becomes a lot more harder when you understand anger solves little problems, it will usually get changed from anger towards more frustration, sire.

People can also suffer from different conditions like IED (Intermittent explosive disorder) which can be defined as a different 'type' of anger.

How?

Agreed