Fir definition

fûr
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The wood of any of these trees.
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Firkin.
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The definition of a fir is an evergreen tree with cones and flattened needles.

An example of a fir is a Christmas tree.

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The wood of any these trees.
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Any of various evergreen trees of the genus Abies, having linear flattened needles and erect cones with deciduous scales.
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Any of several similar or related trees, such as the Douglas fir.
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(chiefly countable, UK) Any conifer of a variety of genera, especially a Scots pine, Pinus sylvestris or a true fir (Abies).
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(chiefly countable, US) A conifer of the genus Abies.
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(uncountable) Wood of such trees.
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Far-infrared radiation.
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Any of a genus (Abies) of cone-bearing evergreen trees of the pine family, having flattened needles and upright cones whose scales fall off at maturity.
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Any of various other coniferous trees, as the Douglas fir.
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Other Word Forms

Noun

Singular:
fir
Plural:
firs

Origin of fir

  • Middle English firre probably of Scandinavian origin perkwu- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle English firre, from either Old Norse fýri (as in fýriskógr 'fir-wood') or Old English fyrh, furh (as in furhwudu 'pinewood'), from Proto-Germanic *furhijǭ (compare Low German Fuhr, German Föhre 'pine', Danish fyr), from Proto-Indo-European *pŕ̥kʷeh₂ (compare Italian (Trentino) porca 'fir'), from *pérkʷus 'oak' (compare Latin quercus 'oak', Albanian shpardh, shparr 'Italian oak', Punjabi ਪਰਗਾਇ (pargāī, “holm oak, Quercus baloot”)). Related to frith.

    From Wiktionary