1. lack of thought or care for the feelings, needs, or rights of other people
Usage: uncountable; formal
2. lack of careful thought or attention to detail
Usage: uncountable; formal

Examples

• His inconsideration for others' feelings made him unpopular at work.
• The driver's inconsideration caused the accident by ignoring traffic signs.
• She showed great inconsideration by arriving two hours late without calling.
• His inconsideration of the facts led to a flawed conclusion.
• The team's inconsideration of safety protocols resulted in injuries.
• Her inconsideration toward her roommate created tension in their apartment.