1. based on reasonable evidence or probability; assumed to be true until proven otherwise
Usage: often used in legal contexts
2. expected to inherit a title or position
Usage: formal

Examples

• The presumptive evidence suggested he was at the scene of the crime.
• DNA testing provided presumptive proof of the suspect’s guilt.
• She is the presumptive heir to the family fortune.
• The presumptive nominee began preparing for the general election.
• Medical tests showed presumptive signs of the disease.
• The presumptive prince will inherit the throne when his father dies.