mindlessness.

1. An absence of careful thought or attention, especially when acting by habit.

2. A quality of having little meaning, intellectual engagement, or clear purpose.

Use it for

Words that belong together

• mindlessness of habit
• careless mindlessness

On the page

The mindlessness of the routine let small errors pass unnoticed.

Usage notes

Primary category: psychology / human behavior. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.