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Definition of thousandth

thousandth

/ˈθaʊ.zənθ/
thou · sandth
Plural:thousandths
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thousandth Lexical Profile

thousandth Game Scores & Validity

• adjective

1

Constituting number one thousand in a sequence; 1,000th.

Example

"The museum welcomed its thousandth visitor of the week with a free membership."

2

Each of one thousand equal parts into which something is or may be divided.

Example

"The laboratory scale is accurate to a thousandth part of a gram."

• noun

1

One of one thousand equal parts of a whole; the fraction 1/1,000 or 0.001.

Example

"The sprinter won the gold medal by just three thousandths of a second."

2

The position or item numbered one thousand in a countable series.

Example

"Today's performance marks the orchestra's thousandth in the historic concert hall."

Synonyms
View all synonyms for thousandth

• Nearby Words

thoughtlessness
thousand
thousandfold
thousandth
thrash
thrasher
thrashing

Word Origin & Etymology

From Middle English thousandth, formed from the cardinal number thousand (from Old English þūsend) and the ordinal suffix -th, replacing the earlier Old English form þūsendeōþa.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Thousandth. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/thousandth
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