verb (used with object), de·fused, de·fus·ing.
- to remove the fuze from (a bomb, mine, etc.).
- to make less dangerous, tense, or embarrassing: to defuse a potentially ugly situation.
verb (used without object), de·fused, de·fus·ing.
- to grow less dangerous; weaken.
- to remove the triggering device of (a bomb, etc)
- to remove the cause of tension from (a crisis, etc)
1943, from de- + fuse. Related: Defused; defusing.