The phrase "pivotal part" means an essential or crucial role or position in a situation or event. It refers to something or someone that plays a major and important role in determining the outcome or direction of something.
Sentences with «pivotal part»
Network: Networking will become an even more pivotal part of my life in 2011. (careerdigital.com)
I just wish they had found a way to make him a more pivotal part of the story and cast. (crunchonthis.com)