What Does Cross Section Mean

A section created by a plane cutting a solid perpendicular to its longest axis.
What does cross section mean. A representation of such a cutting. The noun cross section has 3 senses. A cross section of a human heart cross section noun c representative group.
I was surprised at the cross section of people there. A sample meant to be representative of a whole population. Cross section definition a section made by a plane cutting anything transversely especially at right angles to the longest axis.
Cross section noun c inside view a part of something cut from the rest of it usually cut from side to side in order to see its inside structure or a drawing of this. Definition of cross section. A cutting or piece of something cut off at right angles to an axis also.