"Eleven" derives from the Old English ęndleofon, which is first attested in Bede's late 9th-century Ecclesiastical History of the English People. It has cognates in every See more

The interval of an octave plus a fourth is an 11th. A complete 11th chord has almost every note of a diatonic scale. Regarding musical instruments, there are 11 thumb keys on a bassoon, not counting the whisper key. (A few bassoons have a 12th thumb key.) See more

While 11 has its own name in Germanic languages such as English, German, or Swedish, and some Latin-based languages such as … See more

The number 11 (alongside its multiples 22 and 33) are master numbers in numerology, especially in New Age. See more

In chemistry, Group 11 of the Periodic Table of the Elements (IUPAC numbering) consists of the three coinage metals copper, silver, and gold known from antiquity, and See more

In sports, there are 11 players on an association football (soccer) team, 11 players on an American football team during play, 11 players on a cricket team on the field, and 11 … See more

The idiom "up to eleven", from the movie This Is Spinal Tap.
In Canada
The stylized maple leaf on the Flag of Canada has … See more