The ordinal number matching the number 50 in a series.(noun)
One of 50 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 "fiftieth" in a sentence
"Pentecost that is, the fiftieth day (from a Greek word meaning fiftieth), or Harvest Feast, or Feast of Weeks, may be regarded as a supplement to the Passover."
"In stateroom LY (that is, the fiftieth floor, suite Y), a Plum (in other words, a drunk American) named Mr. P."
"The fiftieth was a race of immigration issues vs culture of corruption- and gooper money vs dem empty pockets."