Definition for Stereotyping
From Biology Forums Dictionary
1) It extends the vocabulary of UML by creating specialized building blocks for modeling. For example, you can specialize the UML class symbol by labeling it as <<Control>> and adding an identifying icon. You may then use the label to identify all control classes or use the icon as a substitute for the standard box. Every UML notation can be stereotyped.
2) the process of attributing behavioral characteristics to all members of a group; formulated on the basis of limited experiences with and information about the group, coupled with an unwillingness to examine prejudices.