[wskish]

It isn't so clear to me. If it conveys a human in any way that humans don't naturally move unassisted then in my mind it qualifies as a conveyance and hence a vehicle, especially in the sense of the the French véhicule, from Latin vehiculum (“a carriage, conveyance”), from vehere (“to carry”)

[sethammons]

Stilts? How tall? Platform shoes? How tall?