fourfold

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English[edit]

Etymology[edit]

From Middle English, from Old English fēowerfeald. Equivalent to four +‎ -fold

Adjective[edit]

fourfold ‎(not comparable)

  1. four times as great
  2. quadruple

Translations[edit]

Adverb[edit]

fourfold ‎(not comparable)

  1. by a factor of four
    • Bible, 2. Sam. xii. 6
      He shall restore the lamb fourfold.

Translations[edit]

Verb[edit]

fourfold ‎(third-person singular simple present fourfolds, present participle fourfolding, simple past and past participle fourfolded)

  1. to increase to four times as much; to multiply by four

Translations[edit]

Noun[edit]

fourfold ‎(plural fourfolds)

  1. (mathematics) An algebraic variety of degree 4.
    • 2015, Brent Pym, “Elliptic singularities on log symplectic manifolds and Feigin--Odesskii Poisson brackets”[1], arXiv: 
      Our main application is to the classification of Poisson brackets on Fano fourfolds.