a narrow layer of a substance that forms in or fills a crack in rock:
A rich vein of iron ore was found in the hillside.
a particular quality or characteristic:
A vein of satirical anger runs through all his work.
In its bid to be elected, the party is attempting to tap (= use) an underlying vein of nationalism in the country.
a style or a temporary mood:
The opening scene is very violent, and the rest of the movie continues in (a) similar vein.
After laughing about the photograph, they began to talk in (a) more serious vein about the damaging effect it could have on his career.