The original meaning
A minimum viable product is the smallest thing a team can put in front of real users that tests the riskiest assumption in the product idea, usually whether anyone wants it enough to use it, pay for it or change behaviour for it. The output that matters is validated learning; the artefact is disposable in principle, however it fares in practice.
A learning instrument, not a cheap first release
Treated properly, an MVP is a decision tool: it converts an argument about the market into evidence, and the decision it feeds has three honest outcomes, invest further, change direction, or stop. That framing has consequences executives should hold onto when an MVP appears in a funding paper. It needs an explicit hypothesis, defined in advance of launch, and a genuine possibility of a negative verdict; an MVP whose only acceptable result is progression is a phase-one build with a fashionable name. It also needs someone empowered to act on a disappointing answer, which is organisationally harder than building the thing.