If we have dinner at seven, it will be difficult to see the eight-o'-clock movie.
seven, 7adj
(7 in number)
yedi s.
There are seven books here.
Burada yedi kitap var.
seven, 7adj
(7 years of age)
yedi yaşında s.
Max is seven now, and in second grade.
seven, 7pron
(people, things: 7 of them)
yedisi zam.
Seven of the students failed the exam.
7n
US, written (seventh day of specified month) (ayın yedinci günü)
7 i.
Not: The example would be spoken "April seventh".
The movie is out in theaters from April 7.
7n
mainly UK, written (seventh day of specified month) (ayın yedinci günü)
7 i.
Not: The example would be spoken as "(the) seventh of February". This date format is most commonly used in the UK, though it is gaining popularity in the US.
You'd better hurry up and submit your application; 7 February is the deadline.