Source : Webster's Revised Unabridged Dictionary (1913)

Glassful \Glass"ful\, n.; pl. {Glassfuls}.
   The contents of a glass; as much of anything as a glass will
   hold.

Glassful \Glass"ful\, a.
   Glassy; shining like glass. [Obs.] ``Minerva's glassful
   shield.'' --Marston.

Source : WordNet®

glassful
     n : the quantity a glass will hold [syn: {glass}]