designfault

noun
UK /dɪˈzaɪn fɔːlt/
US /dɪˈzaɪn fɔːlt/

A design fault is a mistake in how something is made that makes it not work well.

The toy car had a design fault, so its wheels fell off easily.


OTHER MEANINGS

2. A weakness in a plan or system that causes trouble.

The teacher found a design fault in the class rules.

3. A problem built into a product from the start, not caused by the user.

The phone's battery problem was a design fault, not the owner's fault.

4. A mistake in the way something is drawn or planned.

The bridge had a design fault that made it unsafe.