inversion

1. the action of inverting something or the state of being inverted.

   the inversion of the normal domestic arrangement

   an inversion of traditional customer–supplier relationships

2. a reversal of the normal decrease of air temperature with altitude, or of water temperature with depth.
3. the process of finding a quantity, function, etc. from a given one such that the product of the two under a particular operation is the identity.
4. the action or practice of relocating a multinational company's legal residence to a jurisdiction where taxes are levied at a lower rate.

   since the company maintains a franchisee model, it is a viable target for inversion

   administration officials admit that their new effort to deter corporate inversions won't actually stop the practice

5. homosexuality.

mid 16th century (as a term in rhetoric, denoting the turning of an argument against the person who put it forward): from Latin inversio(n- ), from the verb invertere (see invert¹).