roll bar

noun
a heavy steel transverse bar in the form of an inverted U rising from the framework of an automobile to prevent its occupants from being crushed if the vehicle rolls over.
Also, rollbar.


Origin:
1950–55

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The unit shall incorporate a roll bar design to protect components from accidental damage.
During a safety inspection, the mower was considered unsafe due to no manufactured roll bar.
Different vehicle specifications, including requirements for factory equipped seatbelts and a roll bar, type device.
Always use the seat belt when the roll bar is raised.
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