n.1 the act of turning upside down or inside out.
2 the reversal of a normal order, position, or relation.
3 the reversal of the order of words, for rhetorical effect.
4 the reversal of the normal variation of air temperature with altitude.
5 the process or result of inverting.
6 the reversal of direction of rotation of a plane of polarized light.
7 homosexuality.
Derivatives:
inversive adj.
Etymology: L inversio (as INVERT)