What is Bar Chart?

Legal Definition
A bar chart or bar graph is a chart or graph that presents grouped data with rectangle|rectangular bars with lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a Line graph.

A bar graph is a chart that use either horizontal or vertical bars to show comparisons among categories. One axis of the chart shows the specific categories being compared, and the other axis represents a discrete value. Some bar graphs present bars clustered in groups of more than one
-- Wikipedia
Legal Definition
A chart that has horizontal rectangles. The length represents value. Its used to compare values of items in a group. AKA bar graph. Refer to Gantt chart.