Webster's Revised Unabridged Dictionary · 1913

Hidden

Hidden , past participle and adjective

from Hide. Concealed; put out of view; secret; not known; mysterious.
Bring to light the hidden things of darkness. — 1 Cor. iv. 5
My heart, which by a secret harmony Still moves with thine, joined in connection sweet. — Milton
By what best way, Whether of open war, or covert guile, We now debate. — Milton
Collocations (1)
Hidden fifths or Hidden octaves (Music) , consecutive fifths or octaves, not sounded, but suggested or implied in the parallel motion of two parts towards a fifth or an octave.