Meanings
Newcastle upon Tyne (in Britain) and Newcastle (in Australia) were major coal-exporting cities, so sending coal there would be pointless.
How to pronounce "coals to Newcastle":
AU
A pointless venture, in the sense of sending something to a place where it is made, or where they already have an abundance.
Example Sentences
1
Selling sand to the desert is like taking coals to Newcastle.
2
Bringing umbrellas to London is like taking coals to Newcastle.
3
Giving cooking lessons to a chef is like taking coals to Newcastle.
4
Sending textbooks to a library is like taking coals to Newcastle.
5
Offering sunscreen at a beach resort is like taking coals to Newcastle.
