4. To crack or split; to bend or strain so as to weaken; as, to spring
a mast or a yard.
5. To cause to close suddenly, as the parts of a trap operated by a
spring; as, to spring a trap.
6. To bend by force, as something stiff or strong; to force or put by
bending, as a beam into its sockets, and allowing it to straighten when
in place; -- often with in, out, etc.; as, to spring in a slat or a
bar.