"reversible" in the noun sense
1. reversible
a garment (especially a coat) that can be worn inside out (with either side of the cloth showing)
"reversible" in the adjective sense
1. reversible
capable of reversing or being reversed
"reversible hypertension"
2. reversible, two-sided
capable of being reversed or used with either side out
"a reversible jacket"
3. reversible
capable of being reversed
"a reversible decision is one that can be appealed or vacated"
4. reversible
capable of assuming or producing either of two states
"a reversible chemical reaction"
"a reversible cell"
Source: WordNet® (An amazing lexical database of English)
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