From katham; an engraving, i.e. (techn.) A poem -- Michtam.
see HEBREW katham
H4387. Miktam
מִכְתָּם noun [masculine] Mikhtam, a technical term in Psalm titles, meaning unknown (ᵐ5 στηλογθαφια: compare BaePs. p. xiii f.); always with ׳מ לְדָוִד֯׃לְדָוִד Psalm 16:1; 60:1; מ ׳לְדָוִד 56:1; 57:1; 58:1; 59:1.