HIGGAION
in Psa 92:3 means the murmuring tone of the harp. In Psa 9:16 it is a musical sign, denoting probably a pause in the instrumental interlude. In Psa 19:14 the word is rendered "meditation;" and in Lam. 3:62, Lam. 3: "device" (R.V., "imagination").......
SHIGGAION
from the verb shagah, "to reel about through drink," occurs in the title of Ps. 7. The plural form, shigionoth, is found in Hab. 3:1. The word denotes a lyrical poem composed under strong mental emotion; a song of impassioned imagination accompanied with suitable music; a dithyrambic ode.......