The phrase "main contributor" refers to someone who significantly contributes or adds the most to a particular situation, project, or outcome. Full definition
The two main contributors for this divergence could be the concentration in the basket of 24 dual - class stocks and a lack of energy exposure. (theglobeandmail.com)
But probably the other main contributor was that I had simply written for a longer period of time by the time I was self - publishing. (hughhowey.com)
This is particularly important when reform practices runs counter to what the literature on change recommends — that is, engaging the recipients as main contributors to the process. (soundout.org)