1.Definition: a blood vessel that carries blood from the capillaries toward the heart
"All veins except the pulmonary vein carry unaerated blood"
2.Definition: a distinctive style or manner
"He continued in this vein for several minutes"
3.Definition: a layer of ore between layers of rock
4.Definition: any of the vascular bundles or ribs that form the branching framework of conducting and supporting tissues in a leaf or other plant organ