break through is a verb meaning "pass through (a barrier)". It carries 3 recorded senses.
penetrate
“The sun broke through the clouds”
“The rescue team broke through the wall in the mine shaft”
break out
“The tooth erupted and had to be extracted”
Definitions, synonyms and semantic relations for break through come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.