Third-person singular simple present indicative form of predecease.(verb)
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Use "predeceases" in a sentence
"You're smart to also ask about the potential benefit if your ex predeceases you: That amount can be much larger."
"A contingent, or secondary, beneficiary is the person or entity you want to get the proceeds of your accounts if the primary beneficiary predeceases you."
"If one of them predeceases you, you might want that child's share to go to his or her children."