Pronunciation: (chok),[key] —n. 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).
—v.t. 1. to furnish with or secure by a chock or chocks.
2. Naut.to place (a boat) upon chocks.
—adv. as close or tight as possible: chock against the edge.