Learn the meaning and usage of the adjective seamless, which means without a seam or with no spaces or breaks between one part and the next. See pictures, pronunciation, synonyms and example sentences from the Oxford Advanced Learner's Dictionary. Learn the meaning and usage of the adjective seamless, which describes something that has no breaks or gaps in it or which continues without stopping. See synonyms, pronunciation, collocations and examples of seamless in British and American English. Log in to your Seamless account. Once logged in you can order online from local restaurants that deliver in your area and to your address, get coupons and deals, leave reviews for restaurants you've ordered from, and much more. Seamless is a service that lets you order food online from local restaurants and chains in New York City and other cities. You can also get exclusive deals and rewards, support local restaurants impacted by the pandemic, and order alcohol and groceries with Seamless.