I. ˈ ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun
Etymology: after (IV) + burner
: an auxiliary burner attached to the tail pipe of a turbojet engine for injecting fuel into the hot exhaust gases and burning it to provide extra thrust — called also tail-pipe burner
II. noun
: a device for burning or catalytically destroying unburned or partially burned carbon compounds in exhaust (as from an automobile)