ten-thousandfold adjective 2adverb 1 adjective2 •Multiplied by ten thousand.The outburst of novae cannot be explained in this manner, as some have suggested, for it could not possibly produce a ten-thousandfold increase in light; […] — 1920 •Having ten thousand parts or members.The ten-thousandfold law of punishment is rigorously enforced against every creature, man included. — 1906 adverb1 •By a factor of ten thousand.They found that the viscosity increases gradually from the melting point of sulfur, 115 to 119° C (933), up to about 159° C, at which point the viscosity sharply increases ten-thousandfold (55, 1098). — 1962
