1. Coming next after the sixth and just before the eighth in position
   - 7th

1. Position seven in a countable series of things
   "The seventh day of the week is Sunday"
    
2. One part in seven equal parts
   "He spent one-seventh of his day exercising";
   - one-seventh
    
3. The musical interval between one note and another seven notes away from it
   "The jazz chord included a flatted seventh for extra colour"

Derived forms: sevenths

See also: ordinal

Type of: common fraction, interval, musical interval, rank, simple fraction, vulgar fraction [Brit]

Encyclopedia: Seventh