What is the meaning of Isometric?

Of or exhibiting equality in dimensions.

Being or relating to a geometric system of three equal axes lying at right angles to each other (especially in crystallography).

Of or involving muscular contraction against resistance in which the length of the muscle remains the same.

1. Of or involving moves and routines that produce such muscular contraction.

   Of or involving moves and routines that produce such muscular contraction.

   Taking place at constant volume because of being confined by rigid boundaries.

   A line connecting isometric points.

   Source: wiktionary.org