Definition of "clock in" []

• To begin working time, especially by punching in. (verb)
• To be measured at. (verb)

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• "The large street clock in Hanover Square tolled four times."
• "Kenilworth, beneath the azure-painted astronomical clock in Caesar's Tower, when delicate, angelic voices began to sing of her divine beauty."
• "On the desk, on the far side of a jade-green blotter with a leather frame, stood an elegant green onyx pen holder with a quartz clock in the center."