a euphoric or excited state that is not due to ingestion of drugs or another substance
Accomplishing her to-do list gave her a natural high.
After three days on foot in the Serengeti, the less-is-more formula of natural high advocates makes complete sense.
Alex Edwards, Founder of natural high, agrees with this slow-burn philosophy.
In spite of this hard life which he led, Charles rarely lost his love of fun or his natural high spirits.
Somehow it seems to me that a gentleman of natural high honor will always present his average self to the one woman.
Metchnikoff felt his courage returning and also his natural high spirits.
Her first blank despair at sight of the trap she had fallen into, was clearing before her natural high courage.