Definitions of Religion

• Religion is a sensuous symbol for which we lack the supersensuous concept, a figure we cannot finally figure out, which thought cannot ultimately transcend. This does not leave us without a clue; it leaves with only clues, hints, symbols, icons, traces, fingers pointing at the moon and the stars, wondering what is what, affirming an existence whose essence ever eludes us. - Caputo, what to believe - pg 90
•  "Religion is that which grows out of, and gives expression to, experience of the holy in its various aspects." - Rudolf Otto
•  "Religion is the state of being grasped by an ultimate concern, a concern which qualifies all other concerns as preliminary and which itself contains the answer to the question of the meaning of life." - Paul Tillich
• "Religions, then, are systems of meaning embodied in a pattern of life, a community of faith, and a worldview that articulate a view of the sacred and of what ultimately matters." - Schmidt, et al. 

https://web.pdx.edu/~tothm/religion/Definitions.htm#:~:text=%22Religion%20is%20the%20belief%20in,holy%20in%20its%20various%20aspects.%22