Brain Drain
WordNet
noun
(1) Depletion or loss of intellectual and technical personnel
WiktionaryText
Etymology
Spokesmen for the Royal Society of London first coined the expression “brain drain” to describe the outflow of scientists and technologists to the United States and Canada in the early 1950s.
Noun
- The migration of educated or talented people from less economically advanced areas to more economically advanced areas, especially to large cities or richer countries.