defect

US /ˈdiː.fekt/
UK /ˈdiː.fekt/
"defect" picture
1.

a shortcoming, imperfection, or lack

:
The car was recalled due to a manufacturing defect.
Her vision has a slight defect.
1.

to abandon one's country or cause in favor of an opposing one

:
He decided to defect to the enemy's side.
Many athletes defected during the Cold War.