CSV (comma-separated values) is a text file format where each lines contains fields separated by a comma. The format generalizes to “character-separated values” where the separator is some character other than comma.
CSV (comma-separated values) is a format for text files where each line contain multiple fields separated by commas.
There are many variants of the format with different rules for quoting; while the format is standardized in RFC 4180, not all software follows that.
CSV can also stand for “character-separated values”, denoting text files where lines contain fields separated by a character other than a comma (semicolon, tab, etc.).