Usually means: Evergreen tree, conical shape, needle-like.
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We found 48 dictionaries that define the word FIR:

General (28 matching dictionaries)
  1. fir: Merriam-Webster.com
  2. fir: Oxford Learner's Dictionaries
  3. fir: American Heritage Dictionary of the English Language
  4. fir: Collins English Dictionary
  5. fir: Vocabulary.com
  6. Fir, fir: Wordnik
  7. fir: Cambridge Advanced Learner's Dictionary
  8. FIR, fir: Wiktionary
  9. fir: Webster's New World College Dictionary, 4th Ed.
  10. fir: The Wordsmyth English Dictionary-Thesaurus
  11. fir: Infoplease Dictionary
  12. FIR: Dictionary.com
  13. fir: Online Etymology Dictionary
  14. fir: Cambridge Essential American English Dictionary
  15. F.I.R, F.I.R. (TV series), F.I.R. (album), F.I.R. (film), F.I.R (SAB TV), FIR (disambiguation), FIR, Fir: Wikipedia, the Free Encyclopedia
  16. Fir: Online Plain Text English Dictionary
  17. fir: Webster's Revised Unabridged, 1913 Edition
  18. fir: Rhymezone
  19. fir: AllWords.com Multi-Lingual Dictionary
  20. fir: Webster's 1828 Dictionary
  21. FIR: Stammtisch Beau Fleuve Acronyms
  22. fir: Free Dictionary
  23. fir: Mnemonic Dictionary
  24. fir: LookWAYup Translating Dictionary/Thesaurus
  25. fir: Dictionary/thesaurus
  26. fir: Wikimedia Commons US English Pronunciations

Business (1 matching dictionary)
  1. Comprehensive Financial (No longer online)

Computing (3 matching dictionaries)
  1. FIR: Free On-line Dictionary of Computing
  2. BABEL: Computer Oriented Abbreviations and Acronyms (No longer online)
  3. fir: Encyclopedia

Medicine (2 matching dictionaries)
  1. online medical dictionary (No longer online)
  2. Allergy Glossary (No longer online)

Miscellaneous (5 matching dictionaries)
  1. Navajo Code Talkers' Dictionary (No longer online)
  2. Sound-Alike Words (No longer online)
  3. FIR: Acronym Finder
  4. FIR: Three Letter Words with definitions
  5. AbbreviationZ (No longer online)

Religion (2 matching dictionaries)
  1. Fir: Easton Bible
  2. Fir: Smith's Bible Dictionary

Science (1 matching dictionary)
  1. FIR: Extragalactic Astronomy

Slang (3 matching dictionaries)
  1. fir: Green’s Dictionary of Slang
  2. Fir: Street Terms: Drugs and the Drug Trade
  3. FIR, fir: Urban Dictionary

Tech (3 matching dictionaries)
  1. DOD Dictionary of Military Terms: Joint Acronyms and Abbreviations (No longer online)
  2. Sandahl, Middle English Sea Terms (No longer online)
  3. RF Terms Glossary (No longer online)

(Note: See firing as well.)

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Definitions from Wiktionary (FIR)

▸ noun:  (chiefly countable) A conifer of the genus Abies.
▸ noun:  (chiefly countable) Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga) or a Scots pine (Pinus sylvestris).
▸ noun:  (uncountable) Wood of such trees.
▸ adjective:  (signal processing, of a filter) Initialism of finite impulse response; that has impulse response (or response to any finite length input) of finite duration.
▸ noun:  (aviation) Initialism of flight information region; a specified region of airspace in which a flight information service (FIS) and an alerting service (ALRS) are provided [(aviation) A specified region of airspace in which a flight information service and an alerting service are provided.]
▸ noun:  (South Asia, Singapore, law enforcement) Initialism of first information report.
▸ noun:  (uncountable) Abbreviation of far infrared or far infrared radiation.

Similar:
fir tree, true fir, silver fir, abies, noble fir, red fir, firtree, white fir, pine, Colorado fir, more...

Opposite:
soft, pliable, flexible, yielding, malleable

Types:
Douglas fir, red fir, white fir, balsam fir, grand fir, silver fir, noble fir, ponderosa pine, more...

Phrases:
Douglas fir, fir trees, balsam fir, fir tree, fir filter, more...

Adjectives:
white, scotch, red, subalpine, alpine, silver, noble, grand, balsam, young, tall

Colors:
    green,     dark green,     forest green,     pine green,     olive,     moss green,     hunter green,     sage,     emerald,     teal


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▸ Popular adjectives describing FIR

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▸ Rhymes of FIR

▸ Invented words related to FIR

Similar:
fir tree, true fir, silver fir, abies, noble fir, red fir, firtree, white fir, pine, Colorado fir, more...

Opposite:
soft, pliable, flexible, yielding, malleable

Types:
Douglas fir, red fir, white fir, balsam fir, grand fir, silver fir, noble fir, ponderosa pine, more...

Phrases:
Douglas fir, fir trees, balsam fir, fir tree, fir filter, white fir, silver fir, subalpine fir, red fir, grand fir, fir cones, noble fir, alpine fir, Scotch fir, Fraser fir, spruce fir, fir cone, true fir, giant fir, more...

Adjectives:
white, scotch, red, subalpine, alpine, silver, noble, grand, balsam, young, tall

Colors:
    green,     dark green,     forest green,     pine green,     olive,     moss green,     hunter green,     sage,     emerald,     teal



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