The seat of the affections and passions.(noun-plural)
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 "reins" in a sentence
"Evaluating advice or criticism based on what the advisor would produce if he were at the reins is a very sketchy business practice."
"Some boomers have inherited the reins is all, and some of us will inherit the reins from them."
"This argument he insists upon (v. 13-16): Thou hast possessed my reins; thou art Master of my most secret thoughts and intentions, and the innermost recesses of my soul; thou not only knowest, but governest, them, as we do that which we have possession of; and the possession thou hast of my reins is a rightful possession, for thou coveredst me in my mother's womb, that is, thou madest me (Job x. 11), thou madest me in secret."