From Longman Dictionary of Contemporary Englishstonewallstone‧wall /ˌstəʊnˈwɔːl $ ˌstoʊnˈwɒːl/ verb [intransitive] DELAYto delay a discussion, decision etc by talking a lot and refusing to answer questions→ See Verb table
Examples from the Corpus
stonewall• His immediate response was to stonewall.• The overall government line was to stonewall international pressure for pollution curbs, pending more research.StonewallStonewall a British organization that works to improve the legal rights of homosexual men and women, and to persuade politicians to change any laws that treat homosexuals unfairly 