A more thorough explanation:

Definition: Capable of being annulled or avoided.

Examples:

• A defeasible deed
• A defeasible estate
• A defeasible fee simple
• A defeasible interest
• A defeasible remainder
• A defeasible title

These examples illustrate that something that is defeasible can be undone or cancelled. For example, a defeasible deed is a legal document that can be cancelled or invalidated under certain conditions. Similarly, a defeasible estate or fee simple can be revoked if certain conditions are not met. Overall, the term defeasible implies that something is not permanent or absolute, but rather subject to change or cancellation.