league 2 
(lēg)
(lēg)n. Abbr. lea.
1.
a. A unit of distance equal to 3.0 statute miles (4.8 kilometers).
b. Any of various other units of about the same length.
2. A square league.
[Middle English lege, from Old French liue, leguee, from Latin leuga, a measure of distance, of Gaulish origin.]