English

Adjective

fourfold ‎(not comparable)

1. four times as great
2. quadruple

Translations

Adverb

fourfold ‎(not comparable)

1. by a factor of four
   • Bible, 2. Sam. xii. 6

     He shall restore the lamb fourfold.

Translations

Verb

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

Noun

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”, in arXiv:

     Our main application is to the classification of Poisson brackets on Fano fourfolds.