Definition of Gizmo

Noun: gizmo giz-mow

Something unspecified whose name is either forgotten or not known
"there may be some great new gizmo around the corner that you will want to use";
- doodad [N. Amer], doohickey [N. Amer], dojigger [N. Amer], gimmick, gismo, gubbins [Brit], thingamabob, thingumabob, thingmabob, thingamajig, thingumajig, thingmajig, thingummy, whatchamacallit, whatsis, widget, doodah [Brit], doobrie [Brit], doobry [Brit], thingo [Austral], dingus [N. Amer], doover [Austral], doofer [Brit], thingy, whatsit
A device or control that is very useful for a particular job
- appliance, contraption, contrivance, convenience, gadget, gismo, widget