Definition of ball bearing noun from the Oxford Advanced Learner's Dictionary


ball bearing

BrE BrE//ˌbɔːl ˈbeərɪŋ//
; NAmE NAmE//ˌbɔːl ˈberɪŋ//
How machines work
jump to other results
a ring of small metal balls used in a machine to enable the parts to turn smoothly; one of these small metal balls See related entries: How machines work
See the Oxford Advanced American Dictionary entry: ball bearing