hundredfold adjective 1adverb 1verb 1forms 3 adjective1 •Multiplied by a hundred.The struggle with ways and means had recommenced, more difficult now a hundredfold than it had been before, because of their increasing needs. — 1918 adverb1 •By a factor of one hundred. verb1 •(rare) To increase to one hundred times as much; to multiply by a hundred. formshundredfolded · hundredfolding · hundredfolds