To transfer (data or programs) from a peripheral computer or device to a central computer or website, To upload data or a program, verb_ transitive, intransitive, computing to transfer data or files from a peripheral or subordinate system to a larger or more central one; especially from a personal computer to an Internet server, transfer a file or program to a central computer from a smaller computer or a computer at a remote location, noun_ Such a file transfer, A file that is uploaded, An instance of uploading data or a program