Dictionary

ball bearing

noun

: a part of a machine in which another part (such as a metal pole) turns easily

: one of the balls in a ball bearing

Full Definition of BALL BEARING

:  a bearing in which the journal turns upon loose hardened steel balls that roll easily in a race; also :  one of the balls in such a bearing
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First Known Use of BALL BEARING

1883
BALL BEARING Defined for Kids

ball bearing

noun

Definition of BALL BEARING for Kids

1
:  a bearing in which the revolving part turns on metal balls that roll easily in a groove
2
:  one of the balls in a ball bearing

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