noun, plural es·sen·ti·al·i·ties for 2.

the quality of being essential; essential character.
an essential feature, element, or point.

Origin of essentiality

First recorded in 1610–20; essential + -ity Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for essentiality

Contemporary Examples of essentiality

Historical Examples of essentiality