The definition of a vector is a quantity that has both size and direction, or an insect that is a carrier of a disease-producing organism.(noun)
See vector in Webster's New World College Dictionary
Origin: ModL < L, bearer, carrier < vectus, pp. of vehere, to carry: see way
See vector in American Heritage Dictionary 4
Origin: Latin, carrier
Origin: , from vehere, vect-, to carry; see wegh- in Indo-European roots.
Learn more about vector