into the blue

into the blue

Completely gone or disappeared; entirely out of sight or reach; without a trace. Usually preceded by "vanish" or a 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
Farlex Dictionary of Idioms.

into the blue

see under into thin air.
See also: blue
The American Heritage® Dictionary of Idioms by Christine Ammer.

into the blue

At a far distance; into the unknown: spontaneously take a trip into the blue.
See also: blue
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • be in
  • barf
  • barfola
  • blow
  • blown
  • cross over
  • face off
  • face-off
  • answer to
  • bagged