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Webster 1913 Edition

Noun.

The quality or state of being variable; variability.

James i. 17.

, n.

Susceptibility of change; liableness or aptness to alter; changeableness; as the variableness of the weather.

Inconstancy; fickleness; unsteadiness; levity; as the variableness of human passions.

variableness ‎(countable and uncountable, plural variablenesses)