Quick Note

Se•cret
/'sēkrit/
Adjective

1. Not known or seen or not meant to be seen or known by others
"How did you guess I had a secret plan?"
Synonyms: confidential, top secret, classified, unknown, private under wraps

2. Something that is kept or meant to be kept unknown or unseen by others
"A state secret"
Synonyms: confidential matter, confidence, private affair, skeleton in the closet