noun

• (nautical) Any fitting or fixture used to restrict movement, especially movement of a line; traditionally was a fixture near a bulwark with two horns pointing towards each other, with a gap between where the line can be inserted.

verb

• (transitive) To stop or fasten, as with a wedge, or block; to scotch.
  "Gondolas with drop or hopper doors not boarded over should have lading cleated and chocked so as to prevent shifting over doors."
• (intransitive, obsolete) To fill up, as a cavity.
  "When the bells ring, the wood-work thereof shaketh and grapeth (no defect, but perfect of structure), and exactly chocketh into the joynts again; so that it may pass for the lively embleme of the sincere Christian, who, though he hath motum trepidationis, of fear and trembling, stands firmly fixt on the basis of a true faith."
• (nautical) To insert a line in a chock.

adv

• (nautical) Entirely; quite.
  "Tom Hickey, our good-humored, blundering cabin-boy, decorated since poor Schubert's death with the dignities of cook, is in that little dirty cot on the starboard side; the rest are bedded in rows, Mr. Brooks and myself chock aft."

noun

• (obsolete) An encounter.