What does seventeenth mean?
Seventeenth is the ordinal number used to identify the position immediately after the sixteenth in a sequence. It can function as an adjective, as in 'the seventeenth year,' or as a noun referring to the seventeenth item, day, or position, as in 'the seventeenth of June.' The word is used for historical periods, dates, birthdays, rankings, lists, and many other ordered contexts. Its form reflects the underlying numeral seventeen, but it does not simply mean a quantity of seventeen; it identifies the seventeenth place or member of a series. In historical writing, 'seventeenth century' commonly refers to the period from 1601 through 1700. The related adverb seventeenthly is possible but uncommon. Seventeenth is especially useful when precision matters, because it distinguishes an ordinal position from the cardinal number seventeen, which tells how many things there are rather than where one belongs in an order.
Denoting the position immediately after the sixteenth in an ordered series.
"The portrait is believed to date from the early seventeenth century."
Often used before a noun, as in 'seventeenth century' or 'seventeenth-century literature,' and in dates such as 'the seventeenth of March.'
The seventeenth person, thing, day, or position in an ordered series.
"The letter was dated the seventeenth of April."
This use is especially common in dates and formal references to ordered lists or positions.
The plural is grammatical but relatively uncommon; it refers to multiple seventeenth-place entries, people, or occurrences.
"The rankings contain several seventeenths, one for each of the three events."
The seventeenth century began in 1601 and ended in 1700, because ordinary counting systems treat century years as beginning with year one.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of seventeenth
Seventeenth was formed in English by adding the productive ordinal suffix -th to seventeen, following the pattern used for other cardinal numbers such as fourth, fifth, and sixth. The numeral element ultimately derives from the Proto-Germanic and Proto-Indo-European root represented by forms such as seven, seventeen, and seventy. The English word septenary also reflects the same broader numeral tradition through Latin.
Related word forms
How seventeenth is actually used
This is a formal but broadly neutral ordinal term. In dates, it appears in constructions such as 'the seventeenth of June'; in historical and cultural references, 'seventeenth century' is the standard expression.