vector (Noun) — A variable quantity that can be resolved into components.
vector (Noun) — A straight line segment whose length is magnitude and whose orientation in space is direction.
vector (Noun) — (microorganism) any agent (person, animal or microorganism) that carries and transmits a disease. ex. "mosquitos are vectors of malaria and yellow fever" ex. "fleas are vectors of the plague" ex. "when medical scientists talk about vectors they are usually talking about insects"
vector (Noun) — (genetics) a virus or other agent that is used to deliver DNA to a cell.
vector (Noun) — (aviation) a chosen course or direction of motion.
vector (Noun) — (programming) a one-dimensional array.
vector (Verb) — (of an aircraft) set a course towards a selected point.