- fair and just; right
- having a just, lawful claim, or right: the rightful owner
- belonging or owned by just or lawful claim, or by right: a rightful rank
- proper or fitting
- Right or proper; just.
- Having a just or proper claim: Return this dog to its rightful owner.
- Held or owned by just or proper claim: This land is my rightful property.
- By right, by law.
- Who shall pull this sword from the stone is rightful king of England.
- right, -ful