verb

• (ergative) To (cause to) move in continuous contact with a surface.
  "He slid the boat across the grass."
• (intransitive) To move on a low-friction surface.
  "The car slid on the ice."
• (intransitive, baseball) To drop down and skid into a base.
  "Jones slid into second."
• (intransitive) To lose one’s balance on a slippery surface.
  "He slid while going around the corner."

noun

• (photography) A transparent plate bearing an image to be projected to a screen.
  "Please hire a vendor to put these boxfuls of slides under a scanner and convert them all to digital images."
• (by extension, computing) A page of a computer presentation package such as PowerPoint.
  "I still need to prepare some slides for my presentation tomorrow."
• (sciences) A flat, usually rectangular piece of glass or similar material on which a prepared sample may be viewed through a microscope Generally referred to as a microscope slide.
• (baseball) The act of dropping down and skidding into a base