Source : Webster's Revised Unabridged Dictionary (1913)

Gaggle \Gag"gle\, v. i. [imp. & p. p. {Gaggled}; p. pr. & vb. n.
   {Gaggling}.] [Of imitative origin; cf. D. gaggelen, gagelen,
   G. gackeln, gackern, MHG. g?gen, E. giggle, cackle.]
   To make a noise like a goose; to cackle. --Bacon.