The phrase "indispensable source" means something that is extremely important and necessary. It is a source of information or something that cannot be done without. Full definition
Featuring case studies, service analysis and the experiences of author - publishers and ALLi members, the guide is a timely and indispensable source of knowledge for anyone considering self - publishing as an option.» (goodereader.com)
NYC About Blog The Forward, an independent, high - profile weekly newspaper, is a fearless and indispensable source of news and opinion on Jewish affairs. (blog.feedspot.com)
The DJC Project Center is filled with bidding opportunities for contractors, subcontractors, suppliers, architects / engineers and is an indispensable source of business leads. (djcoregon.com)