inversion Definition

1. The act of turning upside down or inside out, or otherwise inverting.
2. The state of being turned upside down, inside out or otherwise inverted.
3. A reversal of position, order, direction, form, effect, etc.

Thesaurus: opposite, reversal, antithesis, contraposition, transposition.
4. Something achieved by inverting.
5. grammar.
The reversal of the word order of normal subject followed by verb, as in up popped the toast. Also called anastrophe.