approaching the edge of sexual orgasm and withdrawing, usually several times, before finally achieving orgasm. meant to intensify orgasm, and for men, volume of ejaculate and force of ejaculation.
this applies to any sexual act and is not limited to masturbation.
My girlfriend and I like to edge before we fuck. She performs oral sex until I'm just about to cum and then we stop for a minute, preventing orgasm, and then we have intercourse. After edging like this our intercourse lasts longer and the orgasm in stronger.