verb-intransitive. Informal To engage in delaying tactics; stall: "stonewalling for time in order to close the missile gap” ( James Reston). verb-intransitive. Informal To refuse to answer or cooperate.verb-intransitive. Sports To play defensively rather than trying to score in cricket.v. Informal 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).