the GNU version of the Collaborative International Dictionary of English
verb-intransitive. To rush upward.
n. Act of rushing upward; an upbreak or upburst.
The Century Dictionary and Cyclopedia
To rush upward. Southey, Thalaba, xii.
n. A rush upward.
Word Usage
"I have heard parts of the opera in workshop performances over the years; in fact, I feel our friendship was sealed when I heard its lush opening in a Manhattan performance space several years ago, and thrilled to the uprush of music."