Webster’s Revised Unabridged Dictionary · 1913
Invisible
In·vis′i·ble, a. [F. invisible, L. invisibilis. See In- not, and Visible.] Incapable of being seen; not perceptible by vision; not visible.
To us invisible, or dimly seen In these thy lowest works. Milton.
Invisible bird (Zoöl.), a small, shy singing bird (Myadestes sibilons), of St. Vincent Islands. — Invisible green, a very dark shade of green, approaching to black, and liable to be mistaken for it.
In·vis′i·ble, n. 1. An invisible person or thing; specifically, God, the Supreme Being.
2. A Rosicrucian; — so called because avoiding declaration of his craft. [Obs.]
3. (Eccl. Hist.) One of those (as in the 16th century) who denied the visibility of the church. Shipley.