defuse definitions WordNet (r) 3.0 (2005) v 1: remove the ... or bomb) 2. to make less harmful, potent, or tense < defuse the crisis > Oxford Reference Dictionary v.tr. 1 remove the ... danger in (a crisis, difficulty, etc.). Webster's 1913 Dictionary Defuse De*fuse", v. t. [Cf. Diffuse.] To disorder; to make ... Collin's Cobuild Dictionary (defuses, defusing, defused) 1. If you defuse a dangerous or tense situation, you calm it. The organization helped defuse potentially violent situations... VERB: V n 2. If someone defuses ...