When something is undetected, it is not noticed or detected. This can refer to anything from a criminal who is hiding to a virus that is still undetected.
The police were unable to detect the burglar, despite their efforts.
The virus is still undetected, which is why nobody knows how to stop it.
adjective
not perceived or discerned
1
The theft remained undetected until yesterday.
2
It is possible for the condition to be undetected until adulthood.
3
Postprandial levels should be nearly undetectable.
4
At the hospital, the creature climbs along the ceiling, undetected.
5
It went undetected by hiding in the human genome itself.
6
For the case of random undetected errors, this observation is true.
7
It probably went undetected due to the subsequent revert war.
8
Houston had his foot on the ropes, but this was undetected by the referee.
9
The army was concealed there undetected during the Irish War of Independence.
10
It also reduces the risks of errors or fraud occurring and going undetected.