adverb
Definition: In a manner that is very close or tight against something.
Example: The boxes were stacked chock against the wall to save space.
noun
Definition: A block or wedge used to stop something from moving, like a wheel, or to hold something in place.
Example: The mechanic placed a chock behind the wheel to prevent the car from rolling.
transitive verb
Definition: To place a boat or object securely on supports to prevent it from moving.
Example: The workers chock the boat to keep it stable while they repair it.