overweather /ˌəʊvə(ɹ)ˈwɛðə(ɹ)/adjective 1verb 1forms 3 adjective1 •Flying high enough to avoid storms and turbulence.This quest for greater knowledge to be utilized in connection with its aircraft of the near future is to be sought through TWA's new experimental overweather laboratory plane. — 1936 verb1 •(no longer used) To expose too long to the influence of harsh weather, or show the effects of such exposure. formsoverweathered · overweathering · overweathers