1. in a way that shows presumption or overconfidence; arrogantly or boldly
Usage: rare; formal

Examples

• He presumingly walked into the meeting without an invitation.
• She presumingly assumed she would be promoted without discussing it with her boss.
• The student presumingly corrected the professor during the lecture.
• They presumingly took the best seats at the theater.
• He presumingly offered advice on matters he knew little about.