Part of speech:
The definition of hidden is concealed.
Operating in a hidden or confidential manner:
Told in confidence; imparted in secret
The definition of furtive is doing something in a sneaky or hidden way.
With one's identity disguised or concealed.
Recognized, proven, etc.
Having interspersed gaps, spaces, or intervals:
The definition of public is something that is related to, available to or known by people.
Of or characteristic of the activities of spies and undercover agents, esp. as extravagantly depicted in popular suspense fiction
Carried out secretly or confidentially
Secret, not spoken of (spoken of only in hushed whispers between insiders).
Show describes something related to a performance.
Being in a secret place; conducted secretly.
Situated, occurring, or operating below the surface of the earth:
Find another word for undercover. In this page you can discover 27 synonyms, antonyms, idiomatic expressions, and related words for undercover, like: hidden, surreptitious, clandestine, privately, surreptitiously, stealthily, secret, secretly, concealed, confidential and covert.