Sentence:  As used in this Act , the term ' saline water ' includes sea water , brackish water , and other mineralized or chemically charged water , and the term ' United States ' extends to and includes the District of Columbia , the Commonwealth of <WSD>Puerto</WSD> Rico , and the territories and possessions of the United States . 
Meaning of the word marked with <WSD> tags:  a self-governing commonwealth associated with the United States occupying the island of Puerto Rico