how a word can be given different meanigs

The authors have come to the realization that teenagers use the word "drama" as a protective mechanism to avoid talking about their problems. When the word "drama" is being used within the teenage population it is empowering to them. This is simply because it allows them to dismiss the immature behavior that is directed to them. It can in most cases prevent a fight from happening because just dismissing something as "drama" means you ignore it. Therefore there is no physical conflict involved. A lot of times in the music business;specifically dealing with hip-hop the word "crazy" is used to describe how good a song is. While we originally see the word "crazy" as meaning a person that is not typically right in the head the definition of the word changes. The fact that a rapper could put many words together , make them rhyme and express it in different meanings is almost genius. So much that your first reaction might be "wow that's crazy" or "that's insane".