inversion
[noun]
Synonyms: reversal, about-face, changeabout, reverse, reversement, reversion, turn, turnabout, turning, volte-face

[TahlilGaran] English Synonym Dictionary ▲

in‧ver‧sion /ɪnˈvɜːʃən $ -ˈvɜːrʒən/ noun [uncountable and countable]

1. formal the act of changing something so that it is the opposite of what it was before, or of turning something upside down (=the bottom is on the top and the top is on the bottom)

2. technical a type of weather condition in which the air nearest the ground is cooler than the air above it

[TahlilGaran] Dictionary of Contemporary English ▲