[2325] Tunnel, specus. – einen T. anlegen, specum effodere.
Brockhaus-1837: Tunnel
Brockhaus-1911: Tunnel
DamenConvLex-1834: Tunnel
Herder-1854: Tunnel
Lueger-1904: Tunnel [3] · Tunnel [2] · Tunnel [1]
Meyers-1905: Tunnel
Pierer-1857: Tunnel
Roell-1912: Mont d'Or-Tunnel · Mont Cenis-Tunnel · Nerthe-Tunnel · St. Clair-Tunnel · Rogers Pass Tunnel · Col di Tenda Tunnel · Ärmelkanal-Tunnel · Elm-Tunnel · Gattico-Tunnel · Fahrnau-Tunnel