Present participle of pre-exist. Alternative spelling of preexisting.(verb)
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Use "pre-existing" in a sentence
"Some of us have diabetes before becoming pregnant; this is known as pre-existing diabetes."
"The federal government just made it a lot easier to get insurance through the "high risk pools" sometimes called "pre-existing condition" programs that operate in each state."
"He outlawed the use of those so-called pre-existing conditions that forced many Americans to go without health insurance or pay exorbitant premiums."