1a structure with a smooth sloping surface for children to slide down:Anna played on the slide
a smooth stretch or slope of ice or packed snow for sliding or tobogganing on.
2an act of sliding along a smooth surface:use an ice axe to halt a slide on ice and snow
Baseball a sliding approach made to a base along the ground.
[usually in combination or with noun modifier] (in skateboarding and snowboarding) a manoeuvre in which the board slides along an obstacle such as a rail or the edge of a ramp.
3a decline in value or quality:the current slide in house prices
4a part of a machine or instrument that slides.
the place on a machine or instrument where a sliding part operates.
[mass noun] slide guitar:I’d been playing slide for years
5a rectangular piece of glass on which an object is mounted or placed for examination under a microscope.
a mounted transparency, especially one placed in a projector for viewing on a screen: [as modifier]:a slide show
6British a hairslide:her hair was held back with a tortoiseshell slide
7a sandal or light shoe without a back.
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Universal
move smoothly along a surface while maintaining continuous contact with it:she slid down the bank into the water (as adjective sliding)the tank should have a sliding glass cover
[with object and adverbial of direction] move (something) smoothly along a surface:she slid the keys over the table
move smoothly, quickly, or unobtrusively: [no object]:I quickly slid into a seat at the back of the hall [with object]:she slid the bottle into her pocket
change gradually to a worse condition or lower level:the country faces the prospect of sliding from recession into slump
let something slide
negligently allow something to deteriorate:Papa had let the business slide after Mama’s death
