v.intr.1. a. To move over a surface while maintaining smooth continuous contact.
b. To participate in a sport that involves such movement: sliding for a medal in luge.
c. To lose a secure footing or positioning; slip: slid on the ice and fell.
d. To pass smoothly and quietly; glide: slid past the door without anyone noticing.
e. Baseball To drop down from a running into a lying or diving position when approaching a base so as to avoid being tagged out.
2. To be ignored or not dealt with; drop: Let the matter slide.
3. a. To decrease: Prices slid in morning trading.
b. To become less favorable or less desirable: Economic conditions have begun to slide.
v.tr.1. To cause to slide or slip: slid the glass down to the other end of the counter.
2. To place covertly or deftly: slid the stolen merchandise into his pocket.
n.1. A sliding movement or action.
2. a. A smooth, usually inclined surface or track for sliding: a water slide.
b. A playground apparatus for children to slide on, typically consisting of a smooth chute climbed onto by means of a ladder.
3. A part that operates by sliding, as the U-shaped section of tube on a trombone that is moved to change the pitch.
4. A period of decline or loss: "The semiconductor industry is heading for a cyclical slide" (New York Times).
5. a. An image on a transparent base for projection on a screen.
b. One of a series of images projected digitally as part of a presentation.
c. A small glass plate for mounting specimens to be examined under a microscope.
6. A fall of a mass of rock, earth, or snow down a slope; an avalanche or landslide.
7. A backless shoe with an open toe.
8. Music a. A slight portamento used in violin playing, passing quickly from one note to another.
b. An ornamentation consisting of two grace notes approaching the main note.
c. A small metal or glass tube worn over a finger or held in the hand, used in playing bottleneck-style guitar.
d. The bottleneck style of guitar playing.