vang verb 3noun 1forms 3 verb3 •To flatten the sail and regulate its position with such a line.On a catamaran, the curved track has enough beam to allow the mainsheet to vang the boom throughout its entire arc. — 1998 •(dialect) To undertake for at the baptismal font; be godfather or godmother to. •(dialect, no longer used) To take; undertake for. noun1 •A line extended down from the end of a gaff to regulate its position.Having the vang and the Cunningham in the right spot can be beneficial. — 2013 formsvanged · vanging · vangs