Other forms: elevens
Eleven is ten plus one. At eleven o'clock, eleven players, page eleven.
English breaks its pattern at eleven and twelve rather than saying oneteen and twoteen, and the reason is old: the word means one left over after ten. A cricket or football team is also called an eleven.
1nounelevenTen plus one.
“A football team has eleven players on the pitch.”
eleven is a number.
Old English endleofan means one left, from a Germanic phrase for one remaining after ten.
Proto-Indo-European
*leyp-
Middle English
elleven
English, today
eleven
From Middle English elleven. From Middle English elleven, enleven, eleven, from Old English endleofan; from Proto-Germanic ainalif (“one left”) (i.e., one left over after having already counted to ten), a compound of ainaz and -lif, from Proto-Indo-European leyp- (“leave, remain”). Compare West Frisian alve, Low German ölven, Dutch elf, German elf, Icelandic ellefu, Danish - and Norwegian elleve.
Etymology from Wiktionary, CC BY-SA