invalidity

From invalid + -ity.

invalidity (countable and uncountable, plural invalidities)

1. The state of being invalid; lack of validity.

• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “invalidity”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.
• “invalidity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.