noun. the middle part of September.
noun. the month following August and preceding October.
noun. (formerly in Britain) an examination taken by 11 and 12 year old students to select suitable candidates for grammar school.
noun. the day in 2001 when Arab suicide bombers hijacked United States airliners and used them as bombs.
adjective. being one more than ten.
noun. the cardinal number that is the sum of ten and one.