melting pot
Concise Oxford English Dictionary © 2008 Oxford University Press:
melting pot
▶noun
- 1 a pot in which metals or other materials are melted and mixed.
- 2 a place where different peoples, styles, etc., are mixed together.
– phrases
in the melting pot Brit. in a process of change and with an uncertain outcome.
in the melting pot Brit. in a process of change and with an uncertain outcome.
'melting pot' also found in these Oxford entries:

