white ant noun 1white-ant verb 1forms 4 noun1 •(informal, old-fashioned) A termite.The most important point in the work of the white ant remains to be noted. I have already said that the white ant is never seen. — 1885 white-ant verb1 •(Australia, informal) To bring down from within; to undermine.The white-anting of ATSIC has been brought about by the usual suspects.If someone undermines you at work you might say they were "white-anting" you. formswhite-anted · white-anting · white-ants · white ants