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Definition of trillionth

trillionth

/ˈtrɪljənθ/
tril · lionth
Plural:trillionths
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trillionth Lexical Profile

trillionth Game Scores & Validity

• adjective

1

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

Example

"The supercomputer completed its trillionth calculation in a fraction of a second."

2

Informally, latest or last in a seemingly endless series of occurrences.

Example

"For the trillionth time, please remember to lock the front door when you leave."

Synonyms
View all synonyms for trillionth

• noun

1

Each of a trillion equal parts into which something is or may be divided.

Example

"A picosecond is equal to one trillionth of a second."

2

The item or person occupying the position number one trillion in a countable sequence.

Example

"That individual data packet was the trillionth transmitted across the network today."

• Rhymes for trillionth

• Nearby Words

triller
trillion
trillionaire
trillionth
trillium
trilobite
trilogy

Cite this Entry

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