eleven

Concise Oxford English Dictionary © 2008 Oxford University Press:
eleven/ɪˈlevn/

▶cardinal number

• 1 equivalent to the sum of six and five; one more than ten; 11. (Roman numeral: xi or XI)

• 2 a sports team of eleven players.

– derivatives
elevenfold adjective & adverb.

– origin OE endleofon, from the base of one + a second element (prob. expressing the sense ‘left over’) occurring also in twelve; of Gmc origin.