1. an original idea, plan, or invention of a particular person

Examples

• The new app was the brainchild of a college student.
• This innovative teaching method is the brainchild of our principal.
• The charity organization was her brainchild and greatest achievement.
• The museum’s interactive exhibit is the brainchild of a local artist.
• That brilliant marketing campaign was entirely his brainchild.
• The recycling program is the brainchild of the environmental club.