1. straying from the proper course or standards; wandering
2. incorrect or mistaken

Examples

• The errant ball flew over the fence and into the neighbor’s yard.
• An errant knight wandered the countryside seeking adventure.
• The teacher corrected the student’s errant calculations.
• Errant winds blew the leaves in all directions.
• His errant behavior at school concerned his parents.
• The errant missile missed its intended target.
• She tried to catch the errant puppy running through the park.