Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

on fire

Definition of on fire

  1. 1 :  in the process of burning <The house was on fire.>

  2. 2 :  feeling very strong enthusiasm, love, etc. <He was on fire with enthusiasm.> <young lovers with their hearts on fire>

  3. 3 :  very successful <The team has been on fire, winning 10 of its last 11 games.>

Word by Word Definitions

  1. :  the phenomenon of combustion manifested in light, flame, and heat

    :  one of the four elements of the alchemists

    :  burning passion :  ardor

  1. :  to set on fire :  kindle

    :  ignite

    :  to give life or spirit to :  inspire

Seen and Heard

What made you want to look up on fire? Please tell us where you read or heard it (including the quote, if possible).


to proceed clumsily or ineffectually

Get Word of the Day daily email!