Slide  —v. (past and past part. Slid) 1 move along a smooth surface with continuous contact on the same part of the thing moving. 2 move quietly or smoothly; glide. 3 glide over ice without skates. 4 (foll. By over) barely touch upon (a delicate subject etc.). 5 (often foll. By into) move quietly or unobtrusively. —n. 1 act of sliding. 2 rapid decline. 3 inclined plane down which children, goods, etc., slide. 4 track made by or for sliding, esp. On ice. 5 part of a machine or instrument that slides. 6 a mounted transparency viewed with a projector. B piece of glass holding an object for a microscope. 7 = *hair-slide.  let things slide be negligent; allow deterioration. [old english]