FLANCH Meaning of FLANCH in English v.tr. & intr. (also flaunch) (esp. with ref. to a chimney) slope inwards or cause to slope inwards towards the top. flanching n.[ perh. f. OF flanchir f. flanche, flanc FLANK ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012