Definition

1. Adjective:
   • Coming after the fifty-fourth in a series; being one of fifty-five equal parts: "55th" is the ordinal form of the cardinal number fifty-five (55). It indicates position or order in a sequence.

Usage

• The adjective "55th" is used directly before a noun to specify its numerical order in a series.
• It is typically written with the numeral followed by the ordinal suffix ("55th"), though it can be written out as "fifty-fifth".

Examples

• Adjective:
  • She celebrated her 55th birthday with a large party.
  • The 55th edition of the annual conference will be held in Paris.
  • He finished in 55th place in the marathon.

Advanced Usage

• As part of a date: Used to denote the day of the month.
  • The event is scheduled for May 55th. (Note: This is a grammatical example; May has only 31 days.)
• In titles and names: Used in the names of sequential entities like regiments, chapters, or legislative bodies.
  • He served in the 55th Infantry Regiment.

Variants and Related Words

• Fifty-fifth: The written form of the ordinal number.
• 55: The cardinal number.
• Ordinal number: The class of numbers (like 1st, 2nd, 3rd, 55th) that denote position in a sequence.

Synonyms

• Fifty-fifth: The literal synonym.

Notes

• "55th" follows the standard rule for forming English ordinals: for numbers ending in "five", the suffix "-th" is used (e.g., fifth, twenty-fifth, fifty-fifth).
• It is not commonly used in idioms or phrasal verbs, as it is a specific numerical adjective.

Adjective

1. the ordinal number of fifty-five in counting order