Sentence:  In September ' 76 Thomas Huxley , Darwin 's famous disciple , came from England to speak in a crowded auditorium at the formal <WSD>opening</WSD> of the University ; and although it was a school for men only , it afforded Henrietta an opportunity to attend its public lectures . 
Meaning of the word marked with <WSD> tags:  a ceremony accompanying the start of some enterprise