Definition from macmillandictionary.com
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Dragons don’t exist.
Opportunities exist in our company for experienced engineers.
There is no evidence that life exists on other planets.
She walked past me as if I didn’t exist.
The union exists to promote your interests.
The company officially ceased to exist at midnight on March 31st.
You can’t exist on only 500 calories a day.
How can I exist for a week without seeing you?
You can’t exist for long without water.