trillion

noun

tril·​lion ˈtri(l)-yən 

1

: a number equal to 1,000 times one billion see Table of Numbers

2

: an indeterminately large number

a trillion mosquitoes out tonight

trillion adjective

trillionth

ˈtri(l)-yən(t)th 

adjective or noun

Examples of trillion in a Sentence

Recent Examples on the Web

Several holdouts were in attendance, including Sens. Ron Johnson (R-WI) and Mike Lee (R-UT), whose opposition is rooted in projections that the legislation will swell the national debt by trillions of dollars over the next decade. —Ramsey Touchberry, The Washington Examiner, 26 June 2025

These policies have saved trillions of dollars and millions of lives. —Gabe Whisnant, MSNBC Newsweek, 25 June 2025

The network now supports trillions of dollars in tokenized assets, according to Digital Asset's CEO. —Ryan Browne, CNBC, 24 June 2025

The surplus of photons triggered a signal through my optic nerves, and in a millisecond, a web of electrical signals reached across my brain, branching into billions of neurons and trillions of synapses. —Michael Jones McKean, The Atlantic, 23 June 2025

Word History

Etymology

French, from tri- + -illion (as in million)

First Known Use

1690, in the meaning defined at sense 1

Rhymes for trillion

• billion
• million
• pillion
• castilian
• civilian
• cotillion
• pavilion
• postilion
• quadrillion
• reptilian
• vermilion
• vermillion

Kids Definition

trillion

noun

tril·​lion ˈtril-yən 

1

: a number equal to 1,000 times one billion see number

2

: a very large number

a trillion mosquitoes out tonight

trillion adjective

trillionth

-yən(t)th 

adjective

trillionth noun