In British English, chips are long, thin pieces of potato that are fried in oil and eaten hot. Pieces of potato like these are called fries or french fries in American English.
We had fish and chips for dinner.
They went to a restaurant near the Capitol for a steak and fries.
In American English, chips or potato chips are very thin slices of potato that have been fried until they are hard and crunchy and are eaten cold. Pieces of potato like these are called crisps in British English.
She ate a large bag of potato chips.
I bought a packet of crisps and a drink.
Chips made from foods other than potatoes usually have that word first.
There was a bowl of tortilla chips and salsa on the table.