Real Dictionary

glue
passive verb: If you say that someone is glued to something, you mean that they are giving it all their attention.
variable noun: Glue is a sticky substance used for joining things together, often for repairing broken things.
verb: If you glue one object to another, you stick them together using glue.

glue in American English
a hard, brittle gelatin made by boiling animal skins, bones, hoofs, etc. to a jelly: when heated in water, it forms a sticky, viscous liquid used to stick things together
to make stick with or as with glue
noun: a hard, impure, protein gelatin, obtained by boiling skins, hoofs, and other animal substances in water, that when melted or diluted is a strong adhesive
transitive verb: to join or fasten with glue

glue in British English
noun: any natural or synthetic adhesive, esp a sticky gelatinous substance prepared by boiling animal products such as bones, skin, and horns
verb: to join or stick together with or as if with glue