/ ˌmænɪfeˈsteɪʃn; NAmE / noun ( formal )
1.
[ C , U ] manifestation (of sth) an event, action or thing that is a sign that sth exists or is happening; the act of appearing as a sign that sth exists or is happening :
The riots are a clear manifestation of the people's discontent.
Some manifestation of your concern would have been appreciated.
2.
[ C ] an appearance of a ghost or spirit :
The church is the site of a number of supernatural manifestations.
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WORD ORIGIN
late Middle English : from late Latin manifestatio(n-) , from the verb manifestare make public.