The ordinal number matching the number ten in a series.(noun)
One of ten equal parts.(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 "tenth" in a sentence
"I am puzzled by your comment about Congress working only on "proposed" budgets; that may be how it is taught in tenth grade American Government, but that sure doesn't represent how it works in practice - there are numerous examples every year of proposed budgets being altered by Congress (both up and down)."
"While looking for something this evening, I stumbled on a box of old high school documents and had nearly forgotten these haiku I wrote in tenth grade:"
"To those of you who spend your afternoons conducting doctoral seminars on the idea of the body in tenth century poetry, my excitement probably seems a little pathetic."