What is the difference between bimodal distribution and unimodal distributions?
From PsychWiki - A Collaborative Psychology Wiki
Distributions of empirical data—which are called frequency distributions—can have a few or many peaks. The difference between bimodal and unimodal distribution is that distribution with two distinct peaks is called bimodal distribution, while distribution with one distinct peak is referred to as a unimodal distribution.
Example / Application
Application: The example of two distributions depicted side by side can be seen in this picture with unimodal distribution on the left and bimodal distribution on the right.