N a comma between the final items in a list, often preceding the word `and' or `or', such as the final comma in the list newspapers, magazines, and books 牛津逗号; 列举多个对象时，在最后的“和（and/or）”前加的逗号
N（名词） a comma between the final items in a list, often preceding the word `and' or `or', such as the final comma in the list newspapers, magazines, and books 牛津逗号; 列举多个对象时，在最后的“和（and/or）”前加的逗号