To talk idly and at length; chatter.(verb-intransitive)
To utter idly or to little purpose.(verb-transitive)
Empty, foolish, or trivial talk; idle chatter.(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 "prate" in a sentence
"The same pople who used to prate about "moral clarity" now argue that we should overlook criminality."
"Those who prate about freedom while kidnapping innocent people off the streets and locking them up in concentrationschlagers don't deserve freedom themselves!"
"But rather than actually examining the things they know in life, they try to prate wise about things they know little of."