Seventeen can be

• Seventeen the magazine, Seventeen (magazine)
• 17 the number, 17 (number)
• Historical years: 17 A.D., 17 B.C., or 1917
• Part of a swear word in Swedish. The origin is debated, and is commonly used as "sjutton också!" ("seventeen, too!"). It is of course also used for the number 17.
• The designation of United States Interstate 17, a freeway in Arizona.
• The title of At Seventeen, a famous song by Janis Ian.
• A name of a prolific pornographic film company, which specialises in young (but above the age of consent) natural looking teens. They make magazines too, which shouldn't be confused with the above magazine.
• Seventeen was the name of a yacht which was commissioned in the United States Navy as Carnelian