Dictionary entry

ἀγράμματος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

ἀγράμματος, ὂν (< γράφω),

without learning (γράμματα), un-lettered (in π. freq. in formula used by one who signs for an illiterate; MM, VGT, s.v.): Ac 4:13 (but cf. Thayer, s.v.).†