由旬 [py] yóuxún [wg] yu-hsün [ko] 유순 yusun [ja] ユジュン yujun ||| A transliteration of the Sanskrit yojana, an Indian measure of distance. Depending upon the source, either seven or nine miles, the distance appropriate for one day's travel for an emperor. According to A.L. Basham, in his The Wonder that was India:

"The commonest table [of measurements], omitting microscopic measurements was:

8 yava (barleycorns) = 1 angula (finger's breadth, 3/4 of an inch)
12 angulas = 1 vitasti (span, 9 inches)
2 vitastis = 1 hasta or aratni (cubit, 18 inches)
4 hastas = 1 da.n.da (rod) or dhanus (bow, 6 feet)
2,000 dhanus = 1 kro'sa (cry) or goruta (cow-call, 2 1/4 miles)
4 kro'sas = 1 yojana (stage, 9 miles approximately)

"Though most sources give the krośa (in modern Indian languages kos) as of 2,000 daṇḍas the Arthaśāstra gives it as only 1,000, the yojana, which was the commonest measure of long distances in ancient India, being thus of only 4 1/2 miles. It is therefore clear that there were at least two yojanas, and distances as given in texts are thus very unreliable. It would seem that for practical purposes the shorter yojana was more often used than the longer, especially in earlier times." [from an e-mail post on Buddha-L by Joseph Crea]

[Dictionary References] Naka1378c Iwa814 [Credit] cmuller jc(entry) cwittern(py)

yojana : [nt.] yoking; application; a measure of length, which is about, 7 miles. || yojanā (f.), construction; suggestion; proposal; an exegesis.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

Yojana (nt.) [Vedic yojana] 1. the yoke of a carriage J vi.38, 42 (=ratha -- yuga). -- 2. a measure of length: as much as can be travelled with one yoke (of oxen), a distance of about 7 miles, which is given by Bdhgh. as equal to 4 gāvutas (DhA ii.13). It occurs in descending scale of yojana -- tigāvuta -- usabha at DhA i.108. <-> Dh 60; J v.37 (yojana -- yojana -- vitthatā each a mile square); SnA 194. More favoured combns of yojana with numbers are the foll.: 1/2 (aḍḍha˚): DA i.35; DhsA 142. -- 3: DhA ii.41. -- 4: PvA 113. -- 5: VvA 33. -- 15: DhA i.17; J i.315; PvA 154. -- 18: J i.81, 348. -- 20: DhA iv.112 (20 X 110, of a wilderness). -- 25: VvA 236. -- 45: J i.147, 348; DhA i.367. -- 50: Vism 417. -- 100: D i.117; It 91; Pv i.1014. -- 500: J i.204. -- 1,000: Ji.203. -- Cp. yojanika.

Pali-English Dictionary, TW Rhys Davids, William Stede,