1. An important or noteworthy discharge, publication, or distribution of something (product, software, information, etc.) that has substantial impact or consequences
The company announced a significant release of their new software version.
A empresa anunciou um lançamento significativo de sua nova versão de software.
2. The act of freeing, discharging, or letting go of something of considerable importance
The significant release of political prisoners was a major milestone in the peace process.
O lançamento significativo de prisioneiros políticos foi um marco importante no processo de paz.
3. In environmental or industrial contexts, a substantial emission or discharge of substances
The environmental agency monitored the significant release of pollutants into the atmosphere.
A agência ambiental monitorou o lançamento significativo de poluentes na atmosfera.