tooltip /ˈtu(ː)l.tɪp/verb 2noun 1forms 3 verb2 •(rare) To add a tooltip to a user interface element. •(rare) To cause a tooltip to appear by hovering over a UI element. noun1 •An element of a graphical user interface in the form of a box of text that appears when a cursor is made to hover over an item; normally used to explain the function of the item. formstooltipped · tooltipping · tooltips