overshare Syllabification: (o·ver·share)Pronunciation: /ˈōvərˌSHe(ə)r/Definition of overshare verb [no object] (often as noun oversharing) reveal an inappropriate amount of detail about one’s personal life:her taste for oversharing was part of a grassroots publicity campaign that cost her and her label nothingDerivatives oversharer noun overshare in other Oxford dictionaries Definition of overshare in the British & World English dictionary