Sentence:  The unprecedented close grouping of seven planets in the sign of Aquarius at the time of the new moon of February 1962; an astronomical formation considered by some astrologers to mark the beginning of earth's entry into the <WSD>Age of Aquarius</WSD>. 
Meaning of the word marked with <WSD> tags:  A historical period corresponding to the astrological sign of Aquarius, concerning the timing of which (past, present, or future) there is a wide range of views.