- The definition of a vein is a blood vessel that is part of the circulation system through which blood is carried or a streak of something.
- An example of a vein is what a nurse pricks with a needle when she needs to draw blood.
- An example of a vein is an area in the earth where gold is found.
An illustration showing veins steming from the heart.
- any blood vessel that carries blood from some part of the body back toward the heart
- loosely any blood vessel
- any of the riblike supports strengthening the membranous wings of an insect
- any of the bundles of vascular tissue forming the framework of a leaf blade
- a more or less continuous body of minerals, igneous or sedimentary rock, etc., occupying a fissure or zone, differing in nature from the enclosing rock, and usually deposited from solution by circulating water
- lode (senses 1 & 2)
- a streak or marking of a color or substance different from the surrounding material, as in marble or wood
- any distinctive quality or strain regarded as running through one's character, or a speech, writing, etc.: a vein of humor in the essay
- course or tenor of thought, feeling, action, etc.
- a temporary state of mind; mood: speaking in a serious vein
Origin of veinMiddle English veine ; from Old French ; from Classical Latin vena
- to streak or mark with or as with veins
- to branch out through in the manner of veins
- a. Anatomy Any of the membranous tubes that form a branching system and carry blood to the heart from the cells, tissues, and organs of the body.b. A blood vessel of any kind; a vein or artery: felt the blood pounding in her veins.
- Botany One of the strands of vascular tissue that form the conducting and supporting framework in a leaf or other expanded plant organ. Also called nervure.
- Zoology One of the thickened cuticular ribs that form the supporting network of the wing of an insect and that often carry hemolymph. Also called nervure.
- Geology A regularly shaped and lengthy occurrence of an ore; a lode.
- A long wavy strip of a different shade or color, as in wood or marble, or as mold in cheese.
- A fissure, crack, or cleft.
- A pervading character or quality; a streak: “All through the interminable narrative there ran a vein of impressive earnestness” (Mark Twain).
- a. A transient attitude or mood.b. A particular turn of mind: spoke later in a more serious vein.
transitive verbveined, vein·ing, veins
- To supply or fill with veins.
- To mark or decorate with veins.
Origin of veinMiddle English veine, from Old French, from Latin vēna.
- (anatomy) A blood vessel that transports blood from the capillaries back to the heart
- (used in plural veins) The entrails of a shrimp
- (botany) In leaves, a thickened portion of the leaf containing the vascular bundle
- (zoology) The nervure of an insect’s wing
- A stripe or streak of a different colour or composition in materials such as wood, cheese, marble or other rocks
- A topic of discussion; a train of association, thoughts, emotions, etc.
- ...in the same vein...
- A style, tendency, or quality.
- The play is in a satirical vein.
- A fissure, cleft, or cavity, as in the earth or other substance.
From Middle English < Old French veine < Latin vēna (“a blood-vessel, vein, artery, also a watercourse, a vein of metal, a vein or streak of wood or stone, a row of trees, strength, a person's natural bent, ect.”); probable origin a pipe or channel for conveying a fluid, from vehere (“to carry, convey”).