furlong, race

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:

Greek:
στάδιον
Transliteration:
stadion
Phonic:
stad’-ee-on
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
KJV Usage:
furlong, race

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.