Definition of 4:
(N) :
(four) a number, numeral and digit.
(N) :
The 4 Lexington Avenue Express is a rapid transit service in the A Division of the New York City Subway.
(N) :
4, also known as Foreigner 4, is the fourth studio album by the British-American rock band Foreigner, released on July 3, 1981, by Atlantic Records.
(N) :
a number, numeral, and digit.
(N) :
the fourth and final studio album by Gerling, produced by Ethan Johns in Hollywood, California, United States, released in March 2006.
(N) :
a 2004 Russian drama film directed by Ilya Khrzhanovsky after a screenplay by Vladimir Sorokin.