Conforming to a standard; usual, typical, or expected. adjective
It's normal for temperatures to drop in the winter.
After the storm, life returned to normal.
The usual, average, or typical state or condition. noun
The doctor said the test results were within the normal range.
After the pandemic, people longed for a return to normal.
Perpendicular to a given line or surface. adjective
In geometry, a normal line is perpendicular to the tangent at a point on a curve.
The engineer calculated the normal force acting on the structure.