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  • fir
    fir
    noun
    any coniferous tree belonging to the genus Abies, of the pine family, characterized by its pyramidal style of growth, flat needles, and erect cones.
  • FIR
    FIR
    abbreviation
    far-infrared radiation.
Synonyms

fir

1 American  
[fur] / fɜr /

noun

firs plural
  1. any coniferous tree belonging to the genus Abies, of the pine family, characterized by its pyramidal style of growth, flat needles, and erect cones.

  2. the wood of such a tree.


FIR 2 American  

abbreviation

  1. far-infrared radiation.


fir British  
/ fɜː /

noun

  1. any pyramidal coniferous tree of the N temperate genus Abies , having single needle-like leaves and erect cones: family Pinaceae See also red fir silver fir balsam fir

  2. any of various other trees of the family Pinaceae , such as the Douglas fir

  3. the wood of any of these trees

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of fir

1250–1300; Middle English firre, Old English fyrh; cognate with Old Saxon furie; akin to Old English furh- (in fuhrwudu pine), Old Norse fura fir, Latin quercus oak (< *perkwu- )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They also dropped by Pyongyang's top cadre school, where they planted a fir tree symbolising their evergreen friendship, Xinhua reported.

From BBC • Jun. 9, 2026

The Montana ranch where he lives now, surrounded by fir and pine trees, the shadows of the Bitterroots and silence, is the perfect retirement home, although it’s one Vachon found more by accident than design.

From Los Angeles Times • Apr. 12, 2026

A $5 permit, a hike through the snow, and a glorious Douglas fir we covered in lights.

From The Wall Street Journal • Dec. 24, 2025

Ford’s fir and birch-burners are radiant examples of human-made art triumphing over digital manufacture.

From Salon • Dec. 18, 2025

He pointed toward a cluster of fir trees.

From "Willodeen" by Katherine Applegate

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