When a law refers to commerce (e.g. interstate/foreign commerce), is this only a reference to economic activity? Or does it refer more generally to forms of communication?
Considering 18 U.S. Code § 1958 (the commission of murder-for-hire), the statute states under part (b): "As used in this section...'facility of interstate or foreign commerce' includes means of transportation and communication".
If another statute does not explicitly define the meaning of "facility of commerce" (or commerce in general), how would this affect the interpretation of the word "commerce"?