- to burn rapidly with intense heat and sparks being given off
- to cause (something) to burn in such a manner
(Ref: Merriam-Webster online, Word of the Day, 15 April 2020)
Use it in a sentence
A heart can deflagrate. Sarah knew. The heart doesn’t always implode, violent and sudden, ricocheting off the rib cage and causing untold damage. The heart, instead, can come to an intense heat, issuing sparks in a frightening manner, burning those who come too close. When Sarah heard the news, she narrowed her eyes and felt the instant her heart was lit. The veins tinder, the heart itself, the muscle, quickly became coal. But coal can turn into a diamond, given enough time and pressure. Sarah would stand her ground and wait. Then she would glitter, fierce and defiant.