1. a device or material that prevents the passage of electricity, heat, or sound
Usage: technical
2. a person or thing that separates or keeps apart from others

Examples

• The electrical isolator prevented current from flowing through the damaged wire.
• Rubber serves as an effective isolator against electrical shock.
• The ceramic isolator kept the high-voltage line safely separated from the metal tower.
• Sound isolators in the recording studio blocked outside noise.
• The policy acted as an isolator between the two conflicting departments.
• Heat isolators in the spacecraft protected the crew from extreme temperatures.