I agree with you Susan that many people might use transcendence in fanciful ways! I kind of think of it this way:

“Did You Know?
The Latin verb scandere means "to climb", so transcend has the basic meaning of climbing so high that you cross some boundary. A transcendent experience is one that takes you out of yourself and convinces you of a larger life or existence; in this sense, it means something close to "spiritual". The American writers and thinkers known as the Transcendentalists, including Ralph Waldo Emerson and Henry David Thoreau, believed in the unity of all creation, the basic goodness of humankind, and the superiority of spiritual vision over mere logic. When we speak of the transcendent importance of an issue such as climate change, we may mean that everything else on earth actually depends on it.”

From [www.merriam-webster.com]