Sentence:  To establish standing under Article III, a plaintiff must satisfy the following three requirements: (1) "the plaintiff must have suffered an injury in fact - an invasion of a legally protected interest which is (a) concrete and particularized, and (b) actual or imminent, not conjectural or <WSD>hypothetical</WSD>"; ... 
Meaning of the word marked with <WSD> tags:  Based upon a hypothesis; conjectural