fourth

fourth
   a unit used in music to describe the ratio in frequency between notes. Two notes differ by a fourth if the higher note has frequency exactly 4/3 times the frequency of the lower one. On the standard 12-tone scale, the perfect fourth is very closely approximated as 5 half steps, corresponding to a frequency ratio of 25/12 = 1.3348.

Dictionary of units of measurement. 2015.

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  • fourth — [fɔːθ ǁ fɔːrθ] adjective ACCOUNTING fourth half/​quarter/​period the fourth half, quarter etc of the financial year * * * fourth UK US /fɔːθ/ adjective [before noun] ► relating to the last three month period of a company s financial year:… …   Financial and business terms

  • Fourth — Fourth, n. 1. One of four equal parts into which one whole may be divided; the quotient of a unit divided by four. [1913 Webster] 2. (Mus.) The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of …   The Collaborative International Dictionary of English

  • fourth — ► ORDINAL NUMBER 1) constituting number four in a sequence; 4th. 2) (a fourth/one fourth) chiefly N. Amer. a quarter. 3) Music an interval spanning four consecutive notes in a diatonic scale, in particular an interval of two tones and a semitone …   English terms dictionary

  • fourth — [ fɔrθ ] number 1. ) in the place or position counted as number 4: the fourth of January We came in fourth in the race. 2. ) one of 4 equal parts of something: QUARTER: Only about a fourth of the children had heard of Shakespeare …   Usage of the words and phrases in modern English

  • fourth — [fôrth, fōrth] adj. [ME feorthe, ferthe < OE feortha: see FOUR & TH2] 1. preceded by three others in a series; 4th 2. designating any of the four equal parts of something 3. designating the forward gear ratio of a motor vehicle next after… …   English World dictionary

  • Fourth — Fourth, a. [OE. fourthe, ferthe, feorthe, AS. fe[ o]r[eth]a, fr. fe[ o]wer four.] 1. Next in order after the third; the ordinal of four. [1913 Webster] 2. Forming one of four equal parts into which anything may be divided. [1913 Webster] …   The Collaborative International Dictionary of English

  • fourth — fourth; fourth·ly; …   English syllables

  • fourth|ly — «FRTH lee, FOHRTH », adverb. in the fourth place …   Useful english dictionary

  • fourth — O.E. feorða; see FOUR (Cf. four) + TH (Cf. th) (1). Cf. O.S. fiortho, O.N. fiorðe, Du. vierde, O.H.G. fiordo, Ger. vierte …   Etymology dictionary

  • fourth — /fawrth, fohrth/, adj. 1. next after the third; being the ordinal number for four. 2. being one of four equal parts. 3. Auto. of, pertaining to, or operating at the gear transmission ratio at which the drive shaft speed is greater than that of… …   Universalium

  • fourth — fourth1 [fo:θ US fo:rθ] adj [: Old English; Origin: feortha, from feower four ] coming after three other things in a series ▪ in the fourth century ▪ her fourth birthday >fourth pron >fourthly adv fourth 2 fourth2 pron …   Dictionary of contemporary English

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