1. designed or made so simple that it is impossible to use incorrectly or fail with
Usage: informal; sometimes considered offensive due to the word 'idiot'; 'foolproof' is a more neutral alternative

Examples

• The new software has an idiotproof interface that even beginners can navigate.
• They designed the machine to be idiotproof so that anyone could operate it without training.
• The instructions are idiotproof—just follow the numbered steps in order.
• This camera has an idiotproof mode that automatically adjusts all settings.
• The company claims their product is idiotproof, but some users still manage to break it.
• An idiotproof system leaves no room for human error.