noun, plural e·phem·er·al·i·ties for 2.

the quality or condition of being ephemeral.
something transitory.

Origin of ephemerality

First recorded in 1815–25; ephemeral + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ephemerality

Contemporary Examples of ephemerality

Historical Examples of ephemerality