be light years away

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be light years away

To be very far away. Usually said of something that is unlikely to happen in the near future. A major technological advancement like that is light years away.
See also: away, light, year

be light years away

to be a very long time in the future A cure for all kinds of cancer is still light years away. (often + from + doing sth) Scientists are light years away from understanding (= it will be a very long time before scientists understand) the human brain.
See also: away, light, year
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