Melting pot is an expression used to describe a place where lots of different groups of people live together and form one big community. It is like a big pot on a stove, where all the different ingredients are added to the pot and then heated up - everything melts together, blends together and forms a new kind of mixture. In real life, different cultures and languages, beliefs, religions and customs all mix together in a melting pot to create a new culture. This can be a great thing because it brings new ideas and opportunities to everyone who lives there.