Definition of ninefold in US English:



  • 1Nine times as great or as numerous.

    ‘a ninefold increase in the amount of traffic’
    • ‘It's a hotbed of activity, too: The number of messages sent by the enteric nervous system to the brain out-numbers the communications traveling in the reverse direction by nearly ninefold.’
    • ‘I brought the few happy endings, not the ninefold majority where the endings were not so happy.’
    • ‘Women with this change and a family history of breast cancer (first degree relative) have a ninefold increase in risk.’
    • ‘Smoking 20 cigarettes a day increases the risk fourfold and 40 cigarettes a day gives rise to a ninefold increase in risk.’
    • ‘Diatoms and green algae exhibited up to ninefold higher growth rates than those for cyanobacterial species.’
    • ‘The package insert descriptions reported as ‘slight’ a ninefold increase in something the marketers called ‘Primary Pulmonary Hypertension.’’
    • ‘There was a fourfold increase in adverse outcome, a fourfold increase in spontaneous abortion, and a ninefold increase in major congenital malformation in women with a glycated haemoglobin concentration above 7.5% at booking.’
    • ‘Moscow's foreign-currency reserves now total $113 billion - a ninefold increase since the end of 1999 and a comfortable cushion against any new crisis.’
    • ‘The incremental cost threshold was near ninefold for both the five trial and four trial models.’
    • ‘Curtin calculates the growth of world trade by a factor of 54.5 from $700 million in 1700 to $38,150 million in 1914, including a ninefold increase 1820-80.’
    • ‘Those who had seven or more of the 17 illnesses had about a ninefold higher risk of suicide than those who had no illnesses.’
    • ‘Patients who had a myocardial infarction during the study had a ninefold increased risk of heart failure.’
    • ‘The material was made by adding lanthanum to an existing catalyst, which led to a ninefold increase in catalytic activity.’
    • ‘The magnitude of the associations between CSA and subsequent high-risk sexual behaviors in these studies varied from a twofold to a ninefold increase in risk.’
    1. 1.1 Having nine parts or elements.
      • ‘We then had the Collect for Purity, after which the choir sang a musical setting of a ninefold Kyrie.’
      • ‘He has set Hong Kong on a ninefold path to nowhere with his report to Beijing outlining conditions for democratic reform in Hong Kong.’
      • ‘The structure was found to be highly symmetric with C9, ninefold rotational symmetry.’


  • By nine times; to nine times the number or amount.

    ‘consumption increased ninefold’
    • ‘Seizures of counterfeit goods have increased ninefold in the European Union, just since 1998.’
    • ‘Introduced three years ago, the payout incentive - sponsored by a local property group - has helped improve the school's GCSEs ninefold in the last four years.’
    • ‘Since 1995-96, Alexander says, Labour has doubled the total budget but increased the public-transport spend ninefold.’
    • ‘The companies pumped nearly $3.8 billion into exploration from 1996 to 2002, finding immense gas deposits that multiplied Bolivia's proven and probable reserves nearly ninefold, to 52 trillion cubic feet.’
    • ‘Bike ridership has gone up ninefold, while car ridership has become stagnant.’
    • ‘In the $25,000 to $100,000 range - the low-end company workhorse - Linux shipments will increase ninefold.’
    • ‘As shown in Table 5, overexpression of ß-protein enhances gene repair ninefold.’
    • ‘Foreign investment was attracted through generous concessions, while foreign trade increased ninefold, 1877-1907.’
    • ‘Just staying still for five minutes burns six calories, but you can increase that twofold by making your bed, fourfold by walking, sixfold by gardening, and ninefold by climbing stairs.’
    • ‘In a five year period, the number of cases of HIV infection increased ninefold, from 30,000 in 1993, to 270,000 in 1998.’
    • ‘Compared with 1968 the proportion of delegates under thirty years old had increased ninefold to 23 per cent, and the proportion of blacks and women had almost tripled to 15.5 per cent and 38 per cent respectively.’
    • ‘With this electrocardiogram patient 1's odds of heart attack increase ninefold from 5: 1 to 45: 1 (posterior probability = 98%).’
    • ‘Hospital personnel per occupied bed multiplied ninefold, and cost per patient day, adjusted for inflation, an astounding fortyfold, from $30 in 1946 to $1, 200 in 1996.’
    • ‘That's even more striking when considering that Bolivia's known gas reserves have grown ninefold since privatization.’
    • ‘An incentive initiative for pupils - sponsored by a local business - has since helped improve the school's GCSEs ninefold.’
    • ‘The total amount of water withdrawn globally from rivers, underground aquifers and other sources has increased ninefold since 1900.’
    • ‘Waterford's annual sales to the port of New York grew ninefold between 1786 and 1808.’
    • ‘With many employers willing to foot all or part of the $10,000 yearly tuition tab, enrollment has grown ninefold over the past decade.’