Lexical Definition

‎ἀγνωσία‎ agnōsía (ag-no-see'-ah) ignorance ^G:N-F
from ‎Α‎ (as negative particle) and ‎γνῶσις‎

ignorance, not the knowledge.

• ignorance (properly, the state)

Abbott-Smith

ἀγνωσία, -ας, ἡ (< γινώσκω), [in LXX: Jb 35:16 (בְּלִי דַּעַת), Wi 13:1, III Mac 5:27*;]
ignorance (opp. to γνῶσις): I Co 15:34, I Pe 2:15 (v. Hort in l.; MM, VGT, s.v.).†

Abbott-Smith References

Liddell-Scott-Jones

ἀγνωσία, ἡ,

ignorance, [Refs 5th c.BC+]; opposed to γνῶσις, [NT+5th c.BC+]

__2 lack of acquaintance, [Refs 2nd c.AD+]
__II being unknown, obscurity, [Refs 5th c.BC+]

_{LSJ Scripture Refs: 1Cor.15.34}