Intensive from hagah; a murmuring sound, i.e. A musical notation (probably similar to the modern affettuoso to indicate solemnity of movement); by implication, a machination -- device, Higgaion, meditation, solemn sound.
see HEBREW hagah
H1902. higgayon
הִגָּיוֺן noun masculine resounding music, meditation, musing; — ׳ה absolute Psalm 9:17; 92:4; construct הֶגְיוֺן Psalm 19:15; suffix הֶגְיוֺנָם Lamentations 3:62; —
1 resounding music; בְּכִנּוֺר חִגָּיוֺן עֲלֵי Psalm 92:4 with sounding music upon the lyre (Che); compare ׳ה סֶ֑לָה 9:17 (a musical direction, see סלה).
2 meditation, musing לִבִּי וְהֶגְיוֺן אִמְרֵיפִֿי Psalm 19:15 the words of my mouth and the meditation of my heart; also in bad sense = plotting עָלַי וְהֶגְיוֺנָם קָמַי שֹׂפְתֵי Lamentations 3:62; the lips of those rising against me, and their imagining against me ("" מַחְשְׁבֹתָם 3:61; compare I.הָגָה 3b).