Meaning & use
perpendicular
Positioned at an exact right angle, ninety degrees, to another line or surface.
See it in a sentence
The carpenter checked that the wall was perpendicular to the floor before installing shelves.
Draw a line perpendicular to the base to find the triangle's height.
A note on using this word
Perpendicular describes a relationship between two lines or surfaces meeting at 90 degrees, not the steepness of a single line.
Words with a similar meaning
right-angled
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
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