Sentence:  This project was carried out under sponsorship of the Ballistic Missile Division of the Air Research and Development Command , U. S. Air Force , and had as its <WSD>goal</WSD> the investigation of the transport by diffusion of the heat energy of chemical binding . 
Meaning of the word marked with <WSD> tags:  the state of affairs that a plan is intended to achieve and that (when achieved) terminates behavior intended to achieve it