In this context, "bills" refer to proposed laws that are being considered by Congress. They can originate from either the House or the Senate, and they go through a series of steps before becoming law.
Related terms
Lawmaking Process: This term describes all the steps that a bill goes through in order to become a law.
Committee: A group within Congress that specializes in reviewing and discussing specific types of bills.
Veto: The power held by the President to reject or refuse to sign a bill into law.