the GNU version of the Collaborative International Dictionary of English
adj. Next in order after the forty-ninth; -- the ordinal of fifty.
adj. Consisting of one of fifty equal parts or divisions.
n. One of fifty equal parts; the quotient of a unit divided by fifty.
The Century Dictionary and Cyclopedia
Next after the forty-ninth: an ordinal numeral.
n. The quotient of unity divided by fifty; one of fifty equal parts of anything: as, twenty-four fiftieths of an estate.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. position 50 in a countable series of things
adj. the ordinal number of fifty in counting order
Word Usage
"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."