Definify.com

Webster 1913 Edition

Noun.

The state or quality of being illegible.

Noun.

The quality of being illegible.

illegibility ‎(countable and uncountable, plural illegibilities)

The characteristic or quality of being illegible; the quality of being difficult or impossible to read.
The illegibility of his handwriting made it unclear which answer he wrote.

the quality of being illegible; the quality of being difficult or impossible to read