1.Definition: a ball of fire (such as the sun or a ball-shaped discharge of lightning)

Category: Objects

2.Definition: a highly energetic and indefatigable person

Related Noun(s):ball of fire, human dynamo, powerhouse

Category: People

3.Definition: an especially luminous meteor (sometimes exploding)

Related Noun(s):bolide

Category: General

4.Definition: the luminous center of a nuclear explosion

Category: Objects