tornado

The definition of tornado is a twirling, narrow funnel of wind with speeds of 100 to 300 miles per hour that damages anything in its path. (noun)

An example of a tornado is the wind funnel that accompanies a hurricane.

See tornado in Webster's New World College Dictionary

☆ a violently whirling column of air, with wind speeds of about 100 to 300 miles per hour, extending downward from a cumulonimbus cloud, esp. in Australia and the central U.S.: usually appearing as a rapidly rotating, slender, funnel-shaped cloud and typically causing great destruction along its narrow path
in W Africa and the adjacent Atlantic, a severe thundersquall
any whirlwind or hurricane

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See tornado in American Heritage Dictionary 4

(tôr-nāˈdō)

noun pl. tor·na·does or tor·na·dos

A rotating column of air ranging in width from a few yards to more than a mile and whirling at destructively high speeds, usually accompanied by a funnel-shaped downward extension of a cumulonimbus cloud.
A violent thunderstorm in western Africa or nearby Atlantic waters.
A whirlwind or hurricane.

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