1.
If you break through a barrier, you succeed in forcing your way through it.
Protesters tried to break through a police cordon...
About fifteen inmates broke through onto the roof.
PHRASAL VERB : V P n , V P
2.
If you break through , you achieve success even though there are difficulties and obstacles.
There is still scope for new writers to break through...
I broke through the poverty barrier and it was education that did it.
PHRASAL VERB : V P , V P n
3.
see also breakthrough