旁征博引 pángzhēngbóyǐn to quote copiously Origin Definitions Defs Strokes Stroke Words Sentences Sents 旁 páng extensive (literary) extensive; widespread; comprehensive征 徵 zhēng to prove (literary) To verify or use as evidence; to prove.博引 bóyǐn to quote copiously To quote widely or extensively from many sources; to cite various references.