Definition
An "heir presumptive" is someone who is currently first in line to inherit a title, position, or property, but whose right to inherit can be defeated if someone else is born who has a stronger claim. It's like being next in line at the DMV, but someone with a special pass can cut ahead of you. This contrasts with 'heir apparent,' whose claim is indefeasible. The term conveys a sense of possibility but also uncertainty.