According to Moyer (1976), he sees it to be a form human aggression that involves inflicting physical damage on a person or property.
My understanding of aggression is a hostile, malicious and destructive behaviours which could be physical, verbal, emotional or gestural that can occur when individuals are angry or frustrated and inflict damage or injury to a person or property.
One can be naturally or positively aggressive on self-defence, when fighting prejudice or injustice and pathological aggression happens when an individual inner nature has become twisted or frustrated.
Types of aggression:
  Instrumental aggression
  Hostile aggression
  Relational aggression

Management Techniques when dealing with aggression:
Body language and tone of voice control: We know we can express our physical, mental and emotional state and communicate them non-verbally to others. So when confronted with an aggressive person, we should control our own body language and tone of voice.
We should:
  Keep our voice calm and even
  Keep our facial expression as natural as possible so not to show emotions.
  Maintain an eye contact which shows that you are paying attention but it is not a must that   the aggressive person must keep an eye contact.
  Make sure that there is enough physical space for the aggressive person and take few seconds to calm yourself down before interacting with the person.

You should avoid:
  Shaking or waving fingers in the face of the aggressive person
  Putting hands on the hub, glare, sneer, frown, get too close, yell, sigh or slam doors as these would make the aggressive person more aggressive.
Stay calm:   Try to stay calm even when the aggressive person is verbally aggressive. Try to focus on the person’s feelings and let him/her know that the care giver cares about him/ her and is concerned about what is happening and is ready to help him/her.
Offer a way out: Offer the aggressive person...