Definition of spirit level noun from the Oxford Advanced Learner's Dictionary


spirit level

BrE BrE//ˈspɪrɪt levl//
; NAmE NAmE//ˈspɪrɪt levl//
(also level)
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a glass tube partly filled with liquid, with a bubble of air inside. Spirit levels are used to test whether a surface is level, by the position of the bubble.
See the Oxford Advanced American Dictionary entry: spirit level