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source of electricity; electrical power
power (button on TV, etc.)
パソコンの電源を入れてください。
Please turn on the computer power.
突然の停電で電源が切れてパソコンの作業が中断した。
Work was interrupted because the power was cut off.
この病院の建物には災害時用の非常用電源設備がある。
This building has emergency power supply.