Definition: The word "what" refers to a subjective or non-specific term that describes something. The word "bill" in the phrase "What Bill is Trump Signing Today" refers to a bill, which means a specific law passed by a legislator. In addition, the phrase "What Bill is Trump Signing Today" also implies the action of signing it. <0x0A><0x0A>For instance:<0x0A>- "What Bill Is Trump Signing Today?" - refers to the signature of the new American Health Care Act (H.R.1628) on a bill introduced by Rep. Kevin Brady, R-Texas.