deflagrate

1 of 2

verb

def·​la·​grate ˈde-flə-ˌgrāt 

deflagrated; deflagrating

transitive verb

: to cause to deflagrate compare detonate sense 1

intransitive verb

: to burn rapidly with intense heat and sparks being given off

deflagration

ˌde-flə-ˈgrā-shən 

noun

deflagration

2 of 2

noun

def·​la·​gra·​tion ˌdefləˈgrāshən 

plural -s

: the process of deflagrating

specifically : a chemical reaction producing vigorous evolution of heat and sparks or flame and moving through the material (as black powder or smokeless powder) at a speed less than that of sound

—distinguished from detonation

Did you know?

Deflagrate combines the Latin verb flagrare, meaning "to burn," with the Latin prefix de-, meaning "down" or "away." Flagrare is also an ancestor of such words as conflagration and flagrant and is distantly related to fulgent and flame. In the field of explosives, deflagrate is used to describe the burning of fuel accelerated by the expansion of gasses under the pressure of containment, which causes the containing vessel to break apart. In comparison, the term detonate (from the Latin tonare, meaning "to thunder") refers to an instant, violent explosion that results when shock waves pass through molecules and displace them at supersonic speed. Deflagrate has been making sparks in English since about 1727, and detonate burst onto the scene at around the same time.

Word History

Etymology

Verb

borrowed from Latin dēflagrātus, past participle of dēflagrāre "to destroy by fire, burn down" from dē- de- + flagrāre "to be ablaze, burn" — more at flagrant

Noun

Latin deflagration-, deflagratio, from deflagratus + -ion-, -io -ion

First Known Use

Verb

circa 1727, in the meaning defined at transitive sense

Rhymes for deflagrate

• abdicate
• abrogate
• acetate
• activate
• actuate
• aggravate
• agitate
• alginate
• alienate
• allocate
• amputate
• angulate

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