Pronunciation: (chok), [key]
1. a wedge or block of wood, metal, or the like, for filling in a space, holding an object steady, etc.
2. Naut.
a. any of various heavy metal fittings on a deck or wharf that serve as fairleads for cables or chains.
b. a shaped support or cradle for a ship's boat, barrel, etc.
c. a small wooden piece or timber for filling a gap, reinforcing an angle, etc., in a wooden vessel.
3. Metalworking.a bearing supporting the end of a rolling mill.
4. Mining.a roof support made of cribbing filled with stones. Cf. cog3 (def. 2).

1. to furnish with or secure by a chock or chocks.
2. place (a boat) upon chocks.

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

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

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