Meaning of つけっぱなし in Japanese

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Definition of つけっぱなし

つけっぱなし(tsukeppanashi) 【つけっ放し ·付けっぱなし ·点けっぱなし ·付けっ放し ·点けっ放し】

(n) leaving a device on (e.g. TV, air conditioner); leaving something engaged (e.g. a key in a lock) →Related words: っぱなし

つけっぱなし(tsukeppanashi) 【浸けっ放し ·漬けっ放し】

けど、一晩ひとばん加湿器かしつきつけっぱなしで朝あさになると窓まどが結露けつろしてするドボドボ・・・。

But by leaving the humidifier on all night in the morning condensation's pouring off the windows ...

Don't sleep with the light left on.

明かりあかりがつけっぱなしでしたよ。

You left your lights on.

He went out with the heater on.

He fell asleep with the radio on.

Last night I fell asleep with television on.

テレビをつけっぱなしにするな！

Don't keep the TV on!

ガスをつけっぱなしにするなんて私わたしも不注意ふちゅういでした。

It was careless of me to leave the gas on.

Don't leave the air-conditioner on.