Definition of "on fire" []

• Being burned by fire. (phrase)
• Achieving good results at a rapid rate. (phrase)

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• "My face on fire from so close a call, I hurried to finish, tossing the curios and keepsakes back into the trunk, intolerant of my native squeamishness as I unhesitantly plucked the shrunken head from the floor."
• "As the plane neared Detroit the young man, who was only fifteen at the time of the 9/11 attacks, tried to initiate his bomb with the chemical, setting himself on fire and suffering severe burns."
• "Blunt was on fire with passion during these evenings, composing a letter to The Times at the very dining table in support of Arabi Bey, arguing in favour of loosening the control that France and England had over Egyptian affairs, cajoling Sir William, who was of course a friend of the editor of The Times, to put pressure on the paper to publish his letter and support the cause."