Pivot
A pivot, in the context of Lean Start-up, is a deliberate change of course when it becomes apparent (through measuring and learning from the MVP) that the current approach is not moving the enterprise towards the drivers of the business model.
Reis identifies a number of pivots a start-up can make:
Zoom In - when one feature becomes the whole product
Zoom Out – when the product isn’t ‘big’ enough so becomes a feature on a bigger product