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v. stone·walled, stone·wall·ing, stone·walls
a. To engage in delaying tactics; stall: "stonewalling for time in order to close the missile gap" (James Reston).
b. To refuse to answer or cooperate.
2. Sports To play defensively rather than trying to score in cricket.
To refuse to answer or cooperate with; resist or rebuff: "I want you to stonewall it, let them plead the Fifth Amendment" (Richard M. Nixon).