Definition: Meaning of, Three Mile Island in English to English dictionary.
Pronunciation:/ θri͜mʌɪlˈʌɪlənd /
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a nuclear power station in Pennsylvania in the US, where there was a serious accident in 1979. The people in charge managed to prevent a MELTDOWN (= when the nuclear material melts and burns through its containers), but the accident increased opposition to nuclear power in the US and prevented new power stations from being built.