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Definition of millionth

millionth

/ˈmɪl.jənθ/
mil · lionth
Plural:millionths
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millionth Lexical Profile

millionth Game Scores & Validity

• adjective

1

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

Example

"The museum awarded a free membership to its millionth visitor this afternoon."

2

Informally denoting a very large, unspecified number in a repetitive series, used for hyperbole.

Example

"I have reminded you for the millionth time to lock the front door before leaving."

3

Constituting one of a million equal parts of something.

Example

"The laboratory instrument can detect a millionth part of a gram with remarkable accuracy."

Synonyms
View all synonyms for millionth

• noun

1

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

Example

"The atomic clock is accurate to within a few millionths of a second."

2

The person or thing in a sequence corresponding to the number one million.

Example

"This newly assembled electric vehicle is the millionth to roll off the factory line."

• Rhymes for millionth

• Nearby Words

millionaire
millionairess
millionfold
millionth
millipede
millisecond
millpond

Word Origin & Etymology

Formed in the 16th century from 'million' (borrowed via Middle French from Italian 'milione', an augmentative of 'mille' meaning 'thousand') combined with the native English ordinal suffix '-th'.

Cite this Entry

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