Definition of pasteurize in US English:


(British pasteurise)


[with object]often as adjective pasteurized
  • Subject (milk, wine, or other products) to a process of partial sterilization, especially one involving heat treatment or irradiation, thus making the product safe for consumption and improving its keeping quality.

    ‘pasteurized milk’
    • ‘Milk is pasteurized to safeguard humans from becoming infected with M. bovis.’
    • ‘The farm family had consumed raw milk but all milk that has left and is still leaving the farm will be pasteurized and safe for human consumption.’
    • ‘In fact, MIF demonstrates by correcting the calculation that pasteurized milk should rank extremely low in relative risk, even given how much milk is consumed in the United States.’
    • ‘Prior to cheese production, this milk is pasteurized in a process that calls for heating it to about 164 degrees, then cooling it via a heat transfer method to about 88 degrees an ideal temperature for making cheese.’
    • ‘All major commercial manufacturers of queso blanco make the cheese by using legally pasteurized milk.’
    • ‘The skimmed milk is pasteurized to remove unwanted bacteria and enzymes, then a small amount is inoculated, kept warm, and allowed to sour.’
    • ‘Santee's milk is pasteurized using state-of-the-art processing equipment.’
    • ‘L. monocytogenes has been found in numerous types of food products including raw or improperly pasteurized milk, soft cheeses, ice cream, raw vegetables, sausages, raw or uncooked poultry, raw meats, and raw or smoked fish.’
    • ‘Both ESL and UHT products are pasteurized at approximately 285 degrees Fahrenheit for five seconds.’
    • ‘We pasteurize the milk, coagulate it with citric acid (Vitamin C), the curd is collected and pressed into molds, cooled and cut.’
    • ‘Since the advent of human immunodeficiency virus infection, banked milk is now pasteurized, and donors are screened for HIV, hepatitis and syphilis.’
    • ‘The main reason most publicans prefer to sell this filtered and pasteurised product is that it's easier to stock and handle.’
    • ‘Every hour, 190,000 pounds of raw milk is pasteurized on its way to nine 55,000-pound cheese vats.’
    • ‘You can prevent Campylobacter infections by using drinking water that's been tested and approved for purity, especially in developing countries, and by drinking milk that's been pasteurized.’
    • ‘Even if you pasteurize the milk and then you test the milk on our instrument, then you will get a bacteria count because we also count the dead bacteria count,’ Lyder says.’
    • ‘The process of boiling a liquid to destroy germs is still used today; most dairy products are pasteurised.’
    • ‘We can get a better, healthier diet - especially in places such as northern Europe - when we can import vegetables during the winter, grow others in greenhouses, keep things refrigerated, pasteurize milk, and so on.’
    • ‘Wines are pasteurized by rapid heating to about 85°C / 185°F for one minute, quick cooling, and return to storage tank or bottling line.’
    • ‘Texas Pastures organic milk is traditionally pasteurized and produced without antibiotics, synthetic hormones or pesticides.’
    • ‘From the silos, raw milk is pasteurized and cooled.’
    clean, make pure, refine, cleanse, decontaminate
    View synonyms


Late 19th century: from the name of L. Pasteur (see Pasteur, Louis) + -ize.