What does this word mean?

The word dreadlocks refers to a hairstyle where the wearer possesses hair in rope-like locks. (Here's an example picture. a href="http://www.newhairstyles2010.com/wp-content/plugins/wp-o-matic/cache/cc5cc_Dreadlocks3.jpg" rel="nofollow"http://www.newhairstyles2010.com/wp-cont…/a ) The sentence means that Ally's father shook her hand because he does routinely. Then he looked at Jaden's hair disapprovingly to find that she had dreadlocks.