tr.v. pa·per-trained, pa·per-train·ing, pa·per-trains
To train (a dog, for example) to urinate and defecate indoors on paper.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
to train (a pet) to defecate or urinate on sheets of disposable paper.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.