Tower of Babel

Short definition from Wiktionary

Proper noun

1. 1
   A tower erected at Babel by the descendants of Noah's son Ham to reach the sky, and whose completion God thwarted by making the workers speak different languages so that they were unable to understand one another.

Noun

1. 1
   A visionary and impractical plan.
2. 2
   Alternative spelling of tower of Babel.
3. 3
   A situation where the use of many different languages is a source of confusion.