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3. into the blue

into the blue

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into the blue

Completely gone or disappeared; entirely out of sight or reach; without a trace. (Usually preceded by "vanish" or some similar verb.) The brutal dictatorship was so mercilessly efficient that anyone who stood up against it soon vanished into the blue. I have no idea where my keys have gone. They seem to have disappeared into the blue!

See also: blue

into the blue

see under into thin air.

See also: blue

into the blue

At a far distance; into the unknown: spontaneously take a trip into the blue.

See also: blue