The highest or most intense degree or point of something. He pushed his body to the extreme during the marathon.
A drastic or severe measure or action. The government went to an extreme when it imposed martial law.
An instance of going beyond what is usual or expected. Cheating on the final exam was an extreme he had never expected from her.
The furthest or most remote point or section. They reached the extreme of the island after a long journey.
Either of the two outer terms in a mathematical proportion. In the proportion 2 : 5 = 6 : 15, the numbers 2 and 15 are the extremes.