A slide is a smooth surface, sloping channel or track for sliding, usually inclined. (German: die Rutsche), (Spanish: tobogán), (French: toboggan), (Russian: ледяная дорожка), (Japanese: すべり台 ) .
In music a portamento.
In geology a landslide or the like.
In baseball to drop down and skid into a base to avoid being put out.