equivalent to the sum of six and five; one more than ten; 11:the room was about eleven feet wideeighteen schools were founded, eleven of them in Los Angeles (Roman numeral: xi or XI)
eleven years old:the eldest is only eleven
eleven o’clock:she often worked until eleven at night
a size of garment or other merchandise denoted by eleven.
Old Englishendleofon, from the base of one + a second element (probably expressing the sense 'left over') occurring also in twelve; of Germanic origin and related to Dutch and German elf
