Perfectly freaking obvious!
Only if you tell the dictionary to take a hike.
Here is the passage, along with the definitions again:
1 Kings 7:23 And he made a molten sea, ten cubits from the one brim to the other: it was round all about, and his height was five cubits: and a line of thirty cubits did compass it round about.
Round:
1. shaped like or approximately like a circle or cylinder
2. shaped like or approximately like a sphere
3. any round shape, as a circle, ring or sphere
4. a circular, ring-shaped, curved, or spherical object
Notice two things:
1. The Bible does not say it was a circle. Instead It says it was "round."
2. Of the four definitions and four depictions (i.e., circle, cylinder, sphere, ring), you stick to only one (circle) religiously.
Why is that? to make the Bible look bad?
You even have to invoke Pi to do it, when the Bible doesn't even mention Pi.
Again, an ellipse has three main characteristics: circumference, long axis, short axis; and Pi plays a minor role.
In short, you're grasping at hay to make the Bible look bad, and it's backfiring on you.