1 a line we imagine through the middle of an object, around which the object turns 轴;轴线:
The earth rotates on its axis.地球绕地轴自转。☞picture at earth 见 earth 插图
2 a fixed line used for marking measurements on a diagram (graph) (图表上的)坐标,轴,参考轴线,基线:
the horizontal/vertical axis横/纵坐标轴