Lexical Definition

‎ἐπαύριον‎ epaúrion (ep-ow'-ree-on) the next day G:ADV
from ‎ἐπί‎ and ‎αὔριον‎

day following, morrow, next day (after).

Abbott-Smith

ἐπ-αύριον, adv. [in LXX for מָחָר, Ge 30:33, elsewhere, Ex 9:6, al., for מׇחֳרָת ;]
on the morrow: in NT, ἡ ἐ. (sc. ἡμέρα), Mt 27:62, Mk 11:12, Jo 1:29, Ac 10:9, al

Abbott-Smith References

Book Refs
Genesis 30:33
Exodus 9:6
Matthew 27:62
Mark 11:12
John 1:29
Acts 10:9

Liddell-Scott-Jones

ἐπαύριον,

adverb on the morrow, τῇ . ἡμέρᾳ [Refs 3rd c.BC+]; ἡμέρα . [LXX]on the morrow, [NT+3rd c.BC+]

LSJ Scripture Refs: LXX.Num.11.32Matt.27.62