variability

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

• (UK) IPA^(key): /ˌvɛəɹ.i.ə.ˈbɪl.ə.ti (ɪ.ti)/
• (US, Mary–marry–merry distinction) IPA^(key): /ˌvæɹ.i.ə.ˈbɪl.ə.ti (ɪ.ti)/
• (US, Mary–marry–merry merger) IPA^(key): /ˌvɛɹ.i.ə.ˈbɪl.ə.ti (ɪ.ti)/

variability (countable and uncountable, plural variabilities)

1. The state or characteristic of being variable.
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, G. & C. Merriam, 1913.
• variability in The Century Dictionary, New York, N.Y.: The Century Co., 1911.