'Manhattan Project' definitions:
Definition of 'Manhattan Project'
(from WordNet)
noun
A former United States executive agency that was responsible for developing atomic bombs during World War II
noun
Code name for the secret United States project set up in 1942 to develop atomic bombs for use in World War II
Definition of 'Manhattan Project'
From: GCIDE
- Manhattan Project \Manhattan Project\ prop. n. (U. S. History) A former US agency that was responsible for developing atomic bombs during World War II. [WordNet 1.5]