The act of investing with an office with suitable solemnity; the solemn or formal beginning of any movement or course of action; the opening in a formal manner of a public building.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
Act of inaugurating ( in its different meanings).
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
The act of inaugurating.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)

Usage examples:

It was the usual place of inauguration for the O'Connors.
- An Illustrated History of Ireland from AD 400 to 1800 by Mary Frances Cusack
The French Minister at the time of the inauguration wrote home to his government that it was the universal confidence in Washington which secured assent to the Constitution.
- From the Easy Chair, series 2 by George William Curtis
At the inauguration of the permanent Government, in February, 1862, a popular aversion to internal taxation had been so strongly manifested as to indicate its partial failure.
- The Rise and Fall of the Confederate Government, Vol. 1 (of 2) by Jefferson Davis