- napalm⇄napalm, noun, verb.
- napalm⇄noun 1. a chemical substance that thickens gasoline. It is an aluminum soap of naphthenic, oleic, and palmitic acids.
2. the thickened or jellied gasoline, used for making incendiary bombs and in flame throwers. - napalm⇄v.t., v.i. to attack with napalm.