tor ‧ na ‧ do /tɔːˈneɪdəʊ $ tɔːrˈneɪdoʊ/ BrE AmE noun ( plural tornadoes or tornados ) [countable]
[ Date: 1500-1600 ; Language: Spanish ; Origin: tronada 'thunderstorm' , from tronar 'to thunder' , from Latin tonare ; influenced by Spanish tornado , past participle of tornar 'to turn' ]
an extremely violent storm consisting of air that spins very quickly and causes a lot of damage ⇨ hurricane , cyclone