Simple past tense and past participle of plug.(verb)
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Use "plugged" in a sentence
"Unplugging the device, he pulled a small screwdriver from his pocket, made several mysterious adjustments, and again plugged in the instrument, which then buzzed vigorously when turned on …."
"The best way to honor my friend's memory was to work through the fears and remain plugged in and engaged."
"Needless to say I jumped in plugged it and then cast off (she actually got up on a plane which was impressive) with the pump on."