1.the defensive football players who line up behind the linemen
2.coil such that current is induced in it by passing a current through the primary coil
3.of second rank or importance or value; not direct or immediate;
the stone will be hauled to a secondary crusher
4.inferior in rank or status;
the junior faculty
5.depending on or incidental to what is original or primary;
a secondary infection
6.not of major importance;
played a secondary role in world events
7.belonging to a lower class or rank