Webster's English Dictionary

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glue

1. glue \'glu:\ \-e-\ \'glu:-*-le-\ n or glu.i.er;  or glu.i.est [ME glu, 
   fr. MF, fr. LL glut-, glus - more at CLAY] 1: a hard protein substance 
   largely gelatin that absorbs water to form a vi scous solution with strong 
   adhesive properties and is obtained by cooking down collagenous materials 
   (as hides, bones); also : a solution of such glue used for sticking things 
   together 2: any of various other strong adhesive substances or solutions  - 
   glu.ey aj
2. glue vt or glued;  or glu.ing;  also glue.ing : to make fast with or as 
   if with glue