Noah Webster's 1828 American Dictionary of the English Language is regarded by many as the finest English
dictionary ever published. The dictionary is available in many forms. I made the content available here for my own purposes,
out of personal admiration for this particular dictionary.
INVISIBIL'ITY INVIS'IBLE, a. s as z. [L. invisibilis; in and visibilis, viso, to see.] That cannot be seen; imperceptible by the sight. Millions of stars, invisible to the naked eye, may be seen by the telescope. He endured, as seeing him who is invisible. Heb 11.
invisibility appears in definitions for these words: