From Longman Dictionary of Contemporary Englishpay-as-you-goˌpay-as-you-ˈgo adjective [only before noun] a pay-as-you-go mobile phone or Internet service is one that you must pay for before you can use it → pre-payFrom Longman Business Dictionarypay-as-you-goˌpay-as-you-ˈgo adjective [only before a noun]FINANCE a pay-as-you-go arrangement is one in which a customer pays for a product or service as they use it, rather than paying the whole amount before or after receiving itPTI Environmental Service will conduct the study, which will be funded on apay-as-you-go basis. —pay as you go noun [uncountable]Pay as you go gives you the opportunity to use the Internet as much or as little as you wish.