Heir (noun)

1. A person who inherits or is entitled to inherit the property of another following the latter's death.
2. A person who is next in line to inherit a title, office, or property.
3. A person who is entitled to inherit property under the laws of intestacy.
4. A person who is legally entitled to inherit a property or a title.
5. A person who is next in line to inherit a property or a title.

Origin:

Middle english, from old english heir, from hēr here, near, from hēr; akin to old high german hēr here.

Examples:

1. He was the heir to the throne.
2. She was the heir to a fortune.
3. He was the only heir to the family business.
4. The heir to the estate was a distant cousin.
5. He was the heir to a prestigious title.