What does and co mean?

Answer 1

I am assuming you are referring to the "and co" as part of a corporate name. If so, "and co" should be followed by a period, indicating that it is the contraction of "and company." The words "and company" as part of a corporate name are fairly meaningless today. They simply suggest that there is more than one person involved in the corporation. Generally speaking, you should place nothing of any significance on those words. Usually, they are simply added to make the corporation look more important than it possibly is.