Lexical Definition

‎κιθαρίζω‎ kitharízō (kith-ar-id'-zo) to play the harp G:V
from ‎κιθάρα‎

harp.

Usage: 3 forms in 3 verses
Form Translated As     In Verse(s)
κιθαριζόντων harping Rev.14.2
κιθαριζόμενον is being harped 1Cor.14.7
κιθάρισον Play the harp LXX.Isa.23.16

Abbott-Smith

κιθαρίζω, [in LXX: Is 23:16 (נגן pi.)*;]
to play upon the lyre or harp: I Co 14:7, Re 14:2.†

Abbott-Smith References

Book Refs
Isaiah 23:16
1 Corinthians 14:7
Revelation 14:2

Liddell-Scott-Jones

κιθαρίζω-ίζω,

Attic dialect future -ιῶ [Refs 4th c.BC+]: (κίθαρις):— play the cithara, φόρμιγγι.. ἱμερόεν κιθάριζε [Refs 8th c.BC+] K.; κιθαρίζειν οὐκ ἐπίσταμαι I am not a 'high-brow', [Refs 5th c.BC+]; τὸ κιθαριζόμενον music composed for the cithara, [Refs 1st c.AD+]