the GNU version of the Collaborative International Dictionary of English
n. The state or quality of being immeasurable.
The Century Dictionary and Cyclopedia
n. The state of being immeasurable or incapable of measurement; limitless extent.
Word Usage
"And when he became aware of the great distance between him and the mountains and the sky, and of the immensity of the mountains, and felt the immeasurableness of that beauty, he was frightened, thinking that it was a vision, a dream."