the length of a straight line passing through the center of a circle and connecting two points on the circumference | a section of something that is long and narrow |
a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface) | the linear extent in space from one end to the other; the longest dimension of something that is fixed in place |
| continuance in time |
| the property of being the extent of something from beginning to end |
| size of the gap between two places |