FIR

fir, fir tree, true fir

(noun) any of various evergreen trees of the genus Abies; chiefly of upland areas

fir

(noun) nonresinous wood of a fir tree

Source: WordNet® 3.1

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Adjective

FIR (not comparable)

(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

FIR (countable and uncountable, plural FIRs)

(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

Initialism of first information report.

(uncountable) Abbreviation of far infrared or far infrared radiation.

Anagrams

• Fri, IFR, IRF, RFI, RIF, Rif, rif

Etymology

Noun

fir (countable and uncountable, plural firs)

(chiefly, countable) A conifer of the genus Abies.

(chiefly, countable) Any pinaceous conifer of related genera, especially a Douglas fir (Pseudotsuga) or a Scots pine (Pinus sylvestris).

(uncountable) Wood of such trees.

Synonyms

• (all countable senses): fir tree

Anagrams

• Fri, IFR, IRF, RFI, RIF, Rif, rif

Source: Wiktionary

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Fir, n. Etym: [Dan. fyr, fyrr; akin to Sw. furu, Icel. fura, AS. furh in furhwudu fir wood, G. föhre, OHG. forha pine, vereheih a sort of oak, L. quercus (Bot.)

Definition: A genus (Abies) of coniferous trees, often of large size and elegant shape, some of them valued for their timber and others for their resin. The species are distinguished as the balsam fir, the silver fir, the red fir, etc. The Scoth fir is a Pinus.

Note: Fir in the Bible means any one of several coniferous trees, including, cedar, cypress, and probably three species of pine. J. D. Hooker.

Source: Webster’s Unabridged Dictionary 1913 Edition

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