Is 'ninetieth' used only for birthdays?

No, it is used for any sequential position (90th) or fraction (1/90) in various contexts like rankings, editions, or statistics.

How do I pronounce the 'tiet' part correctly?

Pronounce it as /ti.əθ/ (two syllables: 'tee-uhth'), not as a single syllable. The schwa (/ə/) is important.

What is the correct spelling?

'Ninetieth'. Remember the 'e' after 'ninety' is kept before adding '-th' (ninety + eth).

Can 'ninetieth' be a noun?

Yes, it can function as a noun meaning 'the ninetieth item in a series' or 'a ninetieth part' (e.g., 'She inherited a ninetieth of the estate').

ninetieth

UK/ˈnaɪn.ti.əθ/US/ˈnaɪn.t̬i.əθ/

Neutral/Formal

My Flashcards

Definition

Meaning

The ordinal number corresponding to ninety; position 90 in a sequence.

One of ninety equal parts (1/90).

Linguistics

Semantic Notes

Used for both position in a sequence (ordinal) and for fractional parts. Common in dates, rankings, anniversaries, and statistical divisions.

Dialectal Variation

British vs American Usage

Differences

No significant lexical or grammatical differences. Spelling and usage are identical.

Connotations

Identical connotations of order, division, or celebration of a milestone.

Frequency

Equally common in both varieties.

Vocabulary

Collocations

strong

birthdayanniversarypercentileflooryear

medium

editionchapterminutepositionpart

weak

attemptdaycontestantpage

Grammar

Valency Patterns

the + ninetieth + nounbe + (the) + (ordinal) + ninetieth + to-infinitivea/one + ninetieth + of + noun

Vocabulary

Synonyms

Neutral

90th

Weak

later part (contextual)final stages (contextual)near the end (contextual)

Vocabulary

Antonyms

firstinitialbeginning

Usage

Context Usage

Business

Referring to percentiles in market analysis, e.g., 'ninetieth percentile in sales'.

Academic

Used in statistics, historical sequencing, and fractional mathematics.

Everyday

Most common for birthdays and anniversaries.

Technical

Precise positional or fractional reference in lists, measurements, or rankings.

Examples

By Part of Speech

adjective

British English

Her ninetieth birthday party is next week.
He finished in the ninetieth position in the race.

American English

She celebrated her ninetieth birthday with family.
The ninetieth edition of the handbook was just released.

Examples

By CEFR Level

My grandad is ninety. His ninetieth birthday is soon.
The shop is on the ninetieth street.

She received a medal for her ninetieth birthday.
We are studying the ninetieth chapter of the book.

The company ranked in the ninetieth percentile for customer satisfaction.
Only one ninetieth of the total land was suitable for farming.

His groundbreaking theory was presented in his ninetieth published paper.
The legislation passed with a majority, albeit by a narrow ninetieth vote.

Learning

Memory Aids

Mnemonic

Think of 'ninety' plus 'eth' – just like 'sixty' becomes 'sixtieth'.

Conceptual Metaphor

POSITION AS NUMBER (a sequence is a line of numbers), PART AS FRACTION (a whole is divided into numbered slices).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

Avoid using 'девяностый' for fractions like 'one ninetieth'. Use 'одна девяностая' (часть).
Ensure agreement in gender/case when used as an ordinal adjective in Russian.

Common Mistakes

Misspelling as 'nintieth' or 'ninetith'.
Incorrect pronunciation: /naɪn.tiθ/ (missing the schwa /ə/).
Using 'ninety' when the ordinal is required (e.g., 'He has his ninety birthday').

Practice

Quiz

Fill in the gap

Her grandmother will celebrate her birthday next month with a large family gathering.

Multiple Choice

What does 'one ninetieth' express?

FAQ

Frequently Asked Questions

: No, it is used for any sequential position (90th) or fraction (1/90) in various contexts like rankings, editions, or statistics.
: Pronounce it as /ti.əθ/ (two syllables: 'tee-uhth'), not as a single syllable. The schwa (/ə/) is important.
: 'Ninetieth'. Remember the 'e' after 'ninety' is kept before adding '-th' (ninety + eth).
: Yes, it can function as a noun meaning 'the ninetieth item in a series' or 'a ninetieth part' (e.g., 'She inherited a ninetieth of the estate').