One that gives aid, especially financial aid. (noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "benefactor" in a sentence
"Again, it's probably not illegal, but you'd think that whoever's taking the money would want to know that their benefactor is an anti-Semitic, homophobic whack-job with delusions of grandeur, not to mention the cosmic e-mail box for Hitler and Stalin."
"Voxlauer watches as his Jewish friend and benefactor is driven to ruin."
"And that our ally and former benefactor is significantly stronger than us and all the non allied nations is as it should be."