Origin: Germanic Old English prefix
Undercover has 4 different meanings across 1 category:
A person who works undercover.
"The detective went undercover to infiltrate the gang without revealing his true identity."
To provide too little coverage.
"The security team decided to stay undercover during the surprise inspection because they were worried about providing too much visible protection for the VIPs."
conducted with or marked by hidden aims or methods
"clandestine intelligence operations"
"cloak-and-dagger activities behind enemy lines"
"hole-and-corner intrigue"
"secret missions"
"a secret agent"
"secret sales of arms"
"surreptitious mobilization of troops"
"an undercover investigation"
"underground resistance"
Performed or happening in secret.
"The journalist conducted an undercover investigation to expose the corruption without anyone knowing she was there."