3. (noun)Axis in World War II the alliance of Germany and Italy in 1936 which later included Japan and other nations "the Axis opposed the Allies in World War II"
5. (noun)axis, axis vertebra the 2nd cervical vertebra; serves as a pivot for turning the head
6. (noun)axis, axis of rotation the center around which something rotates
Definition of 'axis'
Webster Dictionary
1. (noun)axis the spotted deer (Cervus axis or Axis maculata) of India, where it is called hog deer and parrah (Moorish name)
2. (noun)axis a straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a linepassing through a body or system around which the parts are symmetrically arranged
6. (noun)axis also used of the body only of the vertebra, which is prolonged anteriorly within the foramen of the firstvertebra or atlas, so as to form the odontoid process or peg which serves as a pivot for the atlas and head to turn upon
7. (noun)axis one of several imaginary lines, assumed in describing the position of the planes by which a crystal is bounded