Noun
1. a clear appearance;
"a manifestation of great emotion"2. a manifest indication of the existence or presence or nature of some person or thing;
"a manifestation of disease"3. an appearance in bodily form (as of a disembodied spirit)
4. expression without words;
"tears are an expression of grief""the pulse is a reflection of the heart's condition"5. a public display of group feelings (usually of a political nature);
"there were violent demonstrations against the war"