It can also refer to:
* "arch" as in a curved structure
* "arc" as in a part of a curve
* "arcos" which is the plural of "arco" and can mean "arches" or "bows"
The specific meaning of "arco" will depend on the context in which it is used.
For example:
* In music, "arco" indicates that the string instrument should be played with a bow.
* In architecture, "arco" can refer to an arch.
* In literature, "arco" could refer to a bow and arrow or a curved shape.
If you provide more context about where you encountered "arco," I can help you determine the specific meaning.