noun

• (uncountable) A (usually self-sustaining) chemical reaction involving the bonding of oxygen with carbon or other fuel, with the production of heat and the presence of flame or smouldering.
• (countable) An instance of this chemical reaction, especially when intentionally created and maintained in a specific location to a useful end (such as a campfire or a hearth fire).
  "We sat about the fire singing songs and telling tales."
• (countable) The occurrence, often accidental, of fire in a certain place, causing damage and danger.
  "There was a fire at the school last night and the whole place burned down."
• (uncountable, alchemy, philosophy) The aforementioned chemical reaction of burning, considered one of the Classical elements or basic elements of alchemy.

adj

• (slang) Amazing; excellent.
  "This is fire, keep up the amazing work!"

verb

• (transitive) To set (something, often a building) on fire.
  "["]Then I slipped up again with a box of matches, fired my heap of paper and rubbish, put the chairs and bedding thereby, led the gas to the affair, by means of an india-rubber tube, and waving a farewell to the room left it for the last time." / "You fired the house!" exclaimed Kemp. / "Fired the house. It was the only way to cover my trail – and no doubt it was insured.["]"
• (transitive) To heat as with fire, but without setting on fire, as ceramic, metal objects, etc.
  "If you fire the pottery at too high a temperature, it may crack."
• (transitive) To drive away by setting a fire.
  "Till my bad angel fire my good one out."
• (transitive, employment) To terminate the employment contract of (an employee), especially for cause (such as misconduct, incompetence, or poor performance).
  "The first, obvious choice was hysterical and fantastic Blanche – had there not been her timidity, her fear of being ‘fired’[…]."

noun

• (finance) Acronym of financial independence and retire early.
• (economics, business) Acronym of finance, insurance and real estate, a class of businesses.
  "As Figure 2.1 demonstrates, total income acquired by the finance, insurance and real estate (FIRE) sector has been increasing since the early 1980s. While in the 1952–1980 period, the share of national income that went to the FIRE sector hovered between 12 and 14 percent, by the 2000s it had approached 20 percent."