1. the act of forcing oneself or one’s ideas upon others in an unwelcome or inappropriate way
2. something that sticks out or projects in an unwanted or noticeable way

Examples

• His constant obtrusion into private conversations made everyone uncomfortable.
• The obtrusion of personal opinions during the meeting was inappropriate.
• She resented the obtrusion of advertising into every aspect of daily life.
• The architect minimized any obtrusion of modern elements into the historic design.
• The obtrusion of the new building disrupted the neighborhood’s skyline.
• His obtrusion of unwanted advice annoyed his colleagues.