FWIW I consider both my drop bar 1x11 Kona Rove ST (with WTB Venture tires) and my singlespeed, sometimes flat bar, sometimes drop bar Surly Cross Check(with Knards) to be "gravel" bikes, or..."adventure" bikes. The Rove fits the definition more clearly I suppose but they both do double duty on pavement and dirt--I consider them both "go anywhere" bikes.