B1
to send a computer program or a document electronically from your computer, using the Internet
Dictionary examples:
I tried to upload my cat video, but my cat kept walking on the keyboard. (0.0)
I uploaded my resume, but the job site asked for my sense of humor too. (0.0)
My grandma tried to upload cookies to Facebook. She's still learning technology. (0.0)
All the files have been uploaded to the server. (25.1)