A stadium, a Greek measure of distance equal to 606 feet and 9 inches (Luke 24:13; John 6:19; 11:18; Rev. 14:20; 21:16).
·adj A measure of length; the eighth part of a mile; forty rods; two hundred and twenty yards. ...
Webster's Dictionary of the English Language
[Weights And Measures AND Measures] ...
William Smith's Bible Dictionary