/i lev"euhn/ , n.
1. a cardinal number, ten plus one.
2. a symbol for this number, as 11 or XI.
3. a set of this many persons or things, as a football team.
adj.
4. amounting to eleven in number.
[ bef. 900; ME elleven ( e ), OE ellefne, endleofan; c. OHG einlif (G elf ), ON ellifu, Goth ainlib-, lit., one remaining (after counting 10). See ONE, LEAVE 1 ]