Defect
WordNet
noun
(1) A mark or flaw that spoils the appearance of something (especially on a person's body)
"A facial blemish"
(2) A failing or deficiency
"That interpretation is an unfortunate defect of our lack of information"
(3) An imperfection in a bodily system
"Visual defects"
"This device permits detection of defects in the lungs"
(4) An imperfection in a device or machine
"If there are any defects you should send it back to the manufacturer"
verb
(5) Desert (a cause, a country or an army), often in order to join the opposing cause, country, or army
"If soldiers deserted Hitler's army, they were shot"
WiktionaryText