1. the highest or lowest degree, point, or condition of something; the furthest limits
Usage: usually plural; often used in the phrase 'go to extremes'
2. two things that are as different or opposite as possible
Usage: usually plural; often contrasted with each other

Examples

• The weather in this region swings between extremes of heat and cold.
• She tends to go to extremes when making decisions—either all or nothing.
• The two political parties represent opposite extremes on the spectrum.
• Extremes of poverty and wealth exist in the same city.
• He avoids extremes and prefers a balanced approach to life.
• The extremes of the temperature scale are marked on the thermometer.