Definition of preventer in US English:



  • 1A person or thing that prevents something.

    ‘effective as preventers of further infection’
    • ‘Children began taking more reliever medication on average 1 day before increasing preventer, although there was sporadic extra reliever use 4-6 days earlier.’
    • ‘There are two main kinds of asthma medicine, both of which involve inhalers - relievers and preventers.’
    • ‘It was quite a dramatic moment… quite frightening… and then the blow-out preventer was shut in, and it calmed down.’
    • ‘An equally erudite body of experts has argued that fluoride can trigger bone deformities and stain tooth enamel, and has poured scorn and doubt on its worth as a preventer of tooth rot.’
    • ‘No lawn means there's no lawn mower, no bags of crabgrass preventer or grub control.’
    • ‘‘Success,’ Hall believes, ‘is one of the biggest preventers of growth.’’
    • ‘Make sure to install a drain and backflow preventer.’
    • ‘If evidence is to be called on factual issues, it is likely to be mainly about the usual industry practice relating to installation of blow-out preventers.’
    • ‘Unlike relievers, preventers aren't meant to have an immediate effect and should be used as prescribed, whether or not there are symptoms.’
    • ‘Here again, the only way to remain weed free is to apply a weed preventer.’
    • ‘PolyShield regular graffiti preventer forms an invisible barrier on interior and exterior surfaces that acts as a shield to prevent the absorption of vandalistic harm into the substrate.’
    • ‘Reduced pressure backflow preventers are more expensive, used mostly in commercial irrigation installations.’
    • ‘Women are problem preventers; men are problem solvers.’
    • ‘Stretching does not live up to its reputation as an injury preventer, a study has found.’
    • ‘Captain James Cook is widely renowned as an explorer, pioneering navigator and preventer of scurvy.’
    • ‘On the other hand, birth control pills are an effective preventer of pregnancy, which is in turn a powerful risk factor for thrombosis.’
    • ‘I got this call around the time I learned why red clover has an age-old reputation as a cancer preventer.’
    • ‘Also, if you find that you regularly need the reliever medication many times a day you should definitely be on a preventer medication such as an inhaled steroid.’
    • ‘Preventive war rests on the premise that the preventer has accurate and reliable knowledge about the evil enemy's capabilities and intentions.’
    • ‘But their final resting place is under the waves, where they are being used to create artificial reefs, marine habitats, breakwaters, erosion preventers and some very cool diving destinations.’
    1. 1.1Sailing An extra line or wire rigged to support a piece of rigging under strain, or to hold the boom and prevent it from jibing.