1. In a manner that can be annulled, voided, or made void; capable of being defeated or overturned.
Usage: formal; legal/philosophical context

Examples

• The contract was defeasibly valid until the court found grounds to overturn it.
• His claim to the property was defeasibly established, pending further investigation.
• The agreement held defeasibly, subject to the discovery of new evidence.
• She possessed the title defeasibly, knowing it could be challenged in court.
• The judgment was defeasibly rendered and remained open to appeal.