scalar Meaning, Definition & Usage

  1. noun a variable quantity that cannot be resolved into components
  2. adjective of or relating to a musical scale
    • he played some basic scalar patterns on his guitar
  3. adjective of or relating to a directionless magnitude (such as mass or speed etc.) that is completely specified by its magnitude
    • scalar quantity

WordNet

Sca"lar noun
Definitions
  1. (Math.) In the quaternion analysis, a quantity that has magnitude, but not direction; -- distinguished from a vector, which has both magnitude and direction.

Webster 1913