adjective
thirtieth
THUR-tee-uth
Thirtieth (adjective) means coming number thirty in a series. Example: “Their thirtieth wedding anniversary is in June.”
adjective
1
Coming number thirty in a series.
"Their thirtieth wedding anniversary is in June."
"She crossed the line in thirtieth place."
"It was the thirtieth day of the month."
noun
1
One of thirty equal parts of a whole.
"A thirtieth of the monthly rent is the daily cost."
"Each person receives a thirtieth of the total."
"He divided the prize into thirtieths."
How to use thirtieth
Learner’s notesIn plain EnglishThe one that comes at number thirty, or one part in thirty.
When to use it
It is a standard word, often written as 30th in dates.
Memory tip
Turn thirty into thirtieth by changing the y to ie and adding th.
Trace the full origin ↓
Common pairings
thirtieth birthday
thirtieth anniversary
thirtieth of June
thirtieth place
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Etymology
The modern form comes from earlier thirteth, which came from Middle English and before that from Old English. It is built from thirty plus the ending -eth.
Synonyms
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30th
Rhymes for thirtieth
See all rhymes for thirtieth →Frequently asked questions
How do you write thirtieth as a number?
You can write it as 30th.
What does thirtieth mean?
It is the ordinal form of thirty, meaning number thirty in a sequence. As a noun it can also mean one of thirty equal parts.
How do you spell thirtieth?
It is spelt t-h-i-r-t-i-e-t-h, with the y of thirty changing to ie.
What is the meaning of thirtieth?
"thirtieth" (adjective) means coming number thirty in a series.
