noun
a flaw, error, or other imperfection.
The cars were found to have defects in their fuel systems.
She doesn’t see her own beauty and thinks only of her defects.
Forgetfulness is my worst defect.
intransitive verb
to abandon a cause, political party, country, or the like, esp. in order to join another.
The ballerina defected from the Soviet Union and took up residence in England.
He defected from the Republicans to become an independent.