[rɪˈvəːsl], (Noun)

Definitions:
- a change to an opposite direction, position, or course of action
(e.g: a dramatic reversal in population decline in the Alps)

- direct production of a positive image from an exposed film or plate; direct reproduction of a positive or negative image
(e.g: a black-and-white reversal kit)


Phrases:

Origin:
late 15th century (as a legal term): from reverse + -al