edging

noun4

1. •
   Anything that forms, defines, or marks the edge of something.

   • The decorative edging around the door makes it easier to find in the dark.
2. •
   The sexual technique of maintaining a high level of sexual arousal for an extended period of time without reaching orgasm.
3. •
   The operation of shaping or dressing the edge of anything, as of a piece of metal.
4. •
   A technique involving the placement of the edge of the climbing shoe on a sharp hold.