500
1.
to move smoothly and continuously along, as if without effort or resistance, as a flying bird, a boat, or a skater.
2.
to pass by gradual or unobservable change (often followed by along, away, by, etc.).
3.
to move quietly or stealthily or without being noticed (usually followed by in, out, along, etc.).
4.
Aeronautics .
a.
to move in the air, especially at an easy angle downward, with less engine power than for level flight, solely by the action of air currents and gravity, or by momentum already acquired.
b.
to fly in a glider.
5.
Music. to pass from one note to another without a break.
What Is Glide?