Sentence:  As <WSD>used</WSD> 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 Puerto Rico , and the territories and possessions of the United States . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose