1. present participle of presume; assuming something to be true without proof
Usage: present participle form

1. showing excessive confidence or boldness; presumptuous
Usage: often considered rude or inappropriate

Examples

• I’m presuming you’ll be there on time.
• Presuming the weather holds, we’ll have the picnic outdoors.
• She’s presuming too much about their relationship.
• It was presuming of him to use her car without asking.
• That’s rather presuming behavior for a new employee.
• Presuming you agree, we can move forward with the plan.
• His presuming attitude made everyone uncomfortable.