volatile

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volatile

1. (of a substance) capable of readily changing from a solid or liquid form to a vapour; having a high vapour pressure and a low boiling point
2. Computing (of a memory) not retaining stored information when the power supply is cut off
3. a volatile substance

volatile

[′väl·əd·əl]
(chemistry)
Readily passing off by evaporation.

volatile

Descriptive of a substance which passes off easily as a gas or vapor, evaporating quickly.

volatile

(programming)

volatile

(storage)

volatile

With regard to RAM memory, volatile means "temporary" rather than "highly changeable," which is the usual meaning of the word in English. See volatile memory and volatility.