unidentified

an unidentified benefactor

a picture of an unidentified motorcyclist.

a unidentified flying object

unidentified flying object (UFO)

The Institute says that an unidentified virus is to blame for the syndrome.

The previously unidentified objects have now been definitely ascertained as being satellites.

Hello? Fourth Interceptive Command? I see an unidentified object flying around my little head.

Several non-infectious diseases including the leaf red spot, gummosis, herbicide in jury, typhoon damage and genetic albinism and an unidentified leaf crinkle disease are also described.

The unidentified Saudi holidaymaker proposed marriage to a 17-year-old village girl and offered a dowry of about 28,000 dollars as well as gold jewellery, the source said.