Printing Matter that is appended or added without a formal break.(noun)
A derived term, often formed by the addition of an affix, that is included undefined at the end of a dictionary entry.(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 "run-on" in a sentence
"I would suggest the McGuffey readers, which have a section of elocution, at the beginning of each, with vocal exercises to correct slurring of words, run-on sentences, or poor pronunciation."
"And yes, speaking of bad writing that second paragraph of mine is one helluva run-on sentence ..."
"The flat-out inability to paragraph and avoid run-on sentences makes them a pain-in-the-ass to read; his copious use of “Obambi” make them just stupid."