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Derived form of variable, from Old French variable; see variable +‎ -ity.

• (UK) IPA^(key): /ˌvɛəɹ.i.əˈbɪl.ə.ti/, /-ɪ.ti/

• Audio (Southern England):

  (file)

• (US, without the Mary–marry–merry merger) IPA^(key): /ˌvæɹ.i.əˈbɪl.ə.ti/, /-ɪ.ti/
• (US, Mary–marry–merry merger) IPA^(key): /ˌvɛɹ.i.əˈbɪl.ə.ti/, /-ɪ.ti/

variability (countable and uncountable, plural variabilities)

1. The state or characteristic of being variable.

   The experiment showed considerable variability in the results.

   Climate variability affects crop production.

   genetic variability

   natural variability

   high variability

2. The degree to which a thing is variable. In data or statistics this is often a measurement of distance from the mean or a description of data range.

• variableness

• “variability”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• William Dwight Whitney, Benjamin Eli Smith, editors (1895–1910), “variability”, in The Century Dictionary and Cyclopedia: […], New York, N.Y.: The Century Co., →OCLC.