as we know it


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as we know it

As is currently true or commonplace. Environmental issues like that threaten the world as we know it.
See also: know, we

— as we know it

as is familiar or customary in the present.
1991 Scientific American Now that all-out nuclear war seems to be receding as an imminent threat to life as we know it, the National Aeronautics and Space Administration has come up with something else to keep us worried: doomsday asteroids.
See also: know, we