[ I or T ] to move quickly just above a surface without touching it:

[ T ] UK US skip to throw a flat stone horizontally over water so that it touches and rises off the surface several times:

[ I or T ] to read or consider something quickly in order to understand the main points, without studying it in detail:

[ T ] to remove something solid from the surface of a liquid:

[ T ] to secretly use a piece of equipment that records someone's credit card details in order to use their credit card account illegally