Behaving in a way designed to keep intentions or feelings hidden from others. In Scripture acting or speaking in secret is often linked with wrongdoing, although not in all cases. But nothing can be kept secret from God.
Secrecy as a cover for wrongdoing
See also
Absalom's camp
high places, centres of pagan Canaanite worship
Secret activity of false teachers:
Secrecy associated with Satan and the black arts
Secrecy sometimes ensures safety
Nothing can be kept secret from God
God's truths are not made known in secret
Secrecy in worship
Secrets
Divine secrets
pp Mk 4:10-11
Human secrets