1. billboard (British usage); temporary tall fence made of boards enclosing a construction site; fence made of hurdles; temporary balcony made of wood that is hung from the upper walls from which missiles could be dropped. hoardinghoarding , n. [from of. hourd, hourt, barrier, palisade, of german or dutch origin; cf. d. horde hurdle, fence, g. horde, hürde; akin to e. hurdle