Boyd’s Bible Dictionary:
(furrow long). In N. T. for Greek stadium, 600 feet long (Luke 24:13).
Concise Bible Dictionary:
See WEIGHTS AND MEASURES.
Strong’s Dictionary of Greek Words:
Meaning:
στάδιος (stad'-ee-os) from the base of 2476 (as fixed); a stade or certain measure of distance; by implication, a stadium or race-course
From Manners and Customs of the Bible:
John 11:18. Bethany was nigh unto Jerusalem, about fifteen furlongs off.
The stadium, or “furlong,” mentioned here and in Luke 24:13; John 6:19; Revelation 14:20; 21:16, was not so long as our English furlong, being six hundred and six feet and nine inches in length.