1. a person who removes or disables a fuse or explosive device
2. a device or mechanism that removes, disables, or reduces the effect of a fuse
Usage: technical
3. a person or thing that reduces tension, conflict, or a dangerous situation
Usage: figurative

Examples

• The bomb defuser carefully approached the suspicious package.
• Military defusers train for years to safely handle explosive devices.
• A good sense of humor can be a defuser in tense workplace situations.
• The negotiator acted as a defuser between the two angry parties.
• The defuser mechanism prevented the circuit from overloading.
• She was known as the office defuser, always able to calm heated arguments.