1.A shoe or clog, as of iron, attached to a chain, and placed under the wheel of a wagon to prevent its turning when descending a steep hill; a drag; a skidpan; also, by extension, a hook attached to a chain, and used for the same purpose.
3.(Aeronautics) A runner (one or two) under some flying machines, used for landing.
4.A low movable platform for supporting heavy items to be transported, typically of two layers, and having a space between the layers into which the fork of a fork lift can be inserted; it is used to conveniently transport heavy objects by means of a fork lift; a skid without wheels is the same as a pallet.
5.pl. Declining fortunes; a movement toward defeat or downfall; used mostly in the phrase on the skids and hit the skids.
6.Act of skidding; called also side slip.
