To turn a matter over and over in the mind.(verb-intransitive)
To chew cud.(verb-intransitive)
To reflect on over and over again.(verb-transitive)
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 "ruminate" in a sentence
"Again the word "rumination" suggestions an oddly somatic association: to ruminate is to turn over in mind and mouth (as in: chewing the cud)."
"So, once again I come back to my lj after a bit of a lapse - but I just need somewhere to ruminate (ruminate is a word, yes?"
"Their study, which included 1,300 men and women from ages 25 to 75, focused on a person's tendency to "ruminate," which they defined as getting stuck obsessing on negative emotions when trouble enters one's life."