What is Chock?

Chock definition and meaning on Dictionary terms:
a wedge or block of wood, metal, or the like, for filling in a space, holding an object steady, etc.
Nautical. any of various heavy metal fittings on a deck or wharf that serve as fairleads for cables or chains.a shaped support or cradle for a ship’s boat, barrel, etc.a small wooden piece or timber for filling a gap, reinforcing an angle, etc., in a wooden vessel.

Metalworking. a bearing supporting the end of a rolling mill.

Mining. a roof support made of cribbing filled with stones.Compare cog3(def 2).

verb (used with object)
to furnish with or secure by a chock or chocks.
Nautical. to place (a boat) upon chocks.

as close or tight as possible: chock against the edge.