11 11 /ˈɛlɛvən/

adjective

1. () Being one more than ten  ( xi , 11 , eleven )
   being one more than ten
     At eleven o'clock, the meeting will begin.
   At eleven o'clock, the meeting will begin.
   

noun

1. () The cardinal number that is the sum of ten and one  ( eleven , XI , 11 )
   the cardinal number that is the sum of ten and one
    He was eleven years old when he started playing the guitar
   He was eleven years old when he started playing the guitar