a pipe dream

a pipe dream

an idea that could never happen because it is impossible The classless society is just a pipe dream.
See also: dream, pipe
References in periodicals archive ?
A pipe dream of size n is a filling of the staircase shape (n - 1, .
Starting with a k-north-east filling of [lambda], one obtains a pipe dream by replacing every 1 by two turning pipes and every 0 by two crossing pipes.
ET, Golf Channel viewers will find out if Burk is able to get back in the game or if it all proves to be just a pipe dream.
It's not a pipe dream, but a great development and urbanization of the City of Angels.
FOR ALL WE HEAR of the rapid pace of technological development, many users in the real world consider the following truths to be self-evident: Your notebook computer never has enough juice to finish a job on the go, and commercial fuel cells are a pipe dream decades away from realization.