Definition of "isolator" [i•so•la•tor]

• An electrical device that detects short circuits and isolates them (noun)

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• "But the violent motion is confined to the isolator, meaning the building above only rocks very gently."
• "She categorized her boyfriend as an "isolator," a person who attempts to control a partner's behavior by monitoring their visits with friends and family, and progressively limiting the victim's social interaction to only the abuser and victim."
• "Then one day, 2 years after our wedding, the isolator did something very odd."