Is surface of a solid a streamline?

In fluid dynamics, streamlines are defined as line where at each point flow velocity is tangential to the line. Is it correct to say surface of a solid a streamline? On the surface the velocity vector is zero, so it does not make sense to define a streamline.

Another similar situation is when fluid is at rest (no solid surface involved). Can we "draw" streamlines for such case?

-

The individual streamline with velocity zero may not make much sense on its own, but it often does when you consider the bulk of the fluid as a whole. In the case of the surface of a body immersed in a fluid, you could trace a streamline starting at a point infinitesimally close to the surface, where the velocity would be infinitesimally small, but non-zero. The streamline on the surface would be the limit of the streamlines as your starting point moves towards the boundary.

Such analysis cannot be performed on stagnant fluid, i.e. it makes no sense talking of streamlines in the bulk of a stationary fluid.

-