The motion of something that slides.
"The sliding snowboard glided effortlessly down the icy slope."
In plain English: Sliding is when something moves smoothly along a surface without stopping suddenly.
"The sliding of his feet on the wet floor made him lose his balance."
present participle of slide
"The heavy box is sliding across the floor due to lack of friction."
In plain English: To slide means to move quickly and smoothly over a surface, usually without friction stopping you immediately.
"The child was sliding down the playground slide with great delight."
being a smooth continuous motion
"The heavy crate moved forward with a sliding motion across the icy floor without any bumps or jerks."
Designed or able to slide.
"The new drawer features smooth sliding rails that allow it to glide out effortlessly."
In plain English: Sliding describes something that moves smoothly along a surface without friction stopping it immediately.
"The sliding glass door lets in lots of fresh air from outside."