Definition of vital sign noun from the Oxford Advanced Learner's Dictionary


vital sign

BrE BrE//ˌvaɪtl ˈsaɪn//
; NAmE NAmE//ˌvaɪtl ˈsaɪn//
[usually plural] (medical)
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a measurement that shows that somebody is alive, such as the rate of their breathing, their body temperature or their heartbeat to check/monitor the patient’s vital signs