the act or an instance of inverting something

a reversal of position, order, form, or relationship, e.g. a change in normal word order, esp the placement of a verb before its subject

in music, the process or result of inverting the relative positions of the elements of an interval, chord, or phrase

in mathematics, the operation of forming the inverse of a magnitude, operation, or element

in biochemistry, a conversion of a substance showing dextrorotation into one showing laevorotation or vice versa

inversion of sucrose

a conversion of direct current into alternating current

(also temperature inversion) a reversal of the normal atmospheric temperature gradient, in which the layer of air nearest the earth is cooler than the layer above it

archaic, derog homosexuality