What does apophatic mean?

apophatic meaning in Etymology Dictionary

"involving a mention of some thing one feigns to deny; involving understanding acquired by negation," 1850, from Greek apophatikos, from apophasis "denial, answer," from apophanai "to talk off," from apo- "off" (see apo-) + phanai "to speak," linked to pheme "voice" (see fame (n.)).

apophatic meaning in General Dictionary

of or regarding the belief that God may be known to people just with regards to exactly what He is maybe not (such `Jesus is unknowable')