noun.
The roe of a fish.
noun.
A short metallic malleable pin or bolt passing through a hole and so fastened as to keep pieces of metal (or sometimes other substances) together; especially, a short bolt or pin of wrought-iron, copper, or of any other malleable material, formed with a head and inserted into a hole at the junction of two or more pieces of metal, the point after insertion being hammered broad so as to keep the pieces closely bound together.
To fasten with a rivet or with rivets: as, to rivet two pieces of iron.
To clench: as, to rivet a pin or bolt.
Figuratively, to fasten firmly; make firm, strong, or immovable: as, to rivet friendship.
noun.
Bearded wheat.