seventeenfold adjective 2adverb 1 adjective2 •By a factor of seventeen.The decrease in toxicity was seventeenfold […] — 1950 •Having seventeen parts.For this (animal sacrifice) there are seventeen kindling verses; for the year is seventeenfold—there are twelve months and five seasons […] — 1894 adverb1 •By a factor of seventeen.[The] exports from Newcastle were [tripled], from Sunderland quadrupled, and from Stockton multipled seventeenfold ! — 1843
