upload Syllabification: (up·load) ComputingTranslate upload | into French | into German | into Italian | into Spanish Definition of upload verb Pronunciation: /ˈəpˌlōd, ˌəpˈlōd/ [with object] transfer (data) to another computer system; transmit (data). Compare with download. noun Pronunciation: /ˈəpˌlōd/ the action or process of transferring data to another computer system. upload in other Oxford dictionaries Definition of upload in the British & World English dictionary