adj. 25B6; adjective the computer's on : FUNCTIONING, in operation, working, in use, operating.
off.
25B6; adverb she droned on : INTERMINABLY, at length, for a long time, continuously, endlessly, ceaselessly, without a pause/break.
25A0; on and off . See off and on at off .
25A0; on and on FOR A LONG TIME, for ages, for hours, at (great) length, incessantly, ceaselessly, constantly, continuously, continually, endlessly, unendingly, eternally, forever, interminably, unremittingly, relentlessly, indefatigably, without let-up, without a pause/break, without cease.