|Origin:||tri- 'three' + -illion (as in million)|
tril‧lion plural trillion or trillions
the number 1,000,000,000,000:
In a short time the number of cells is more than a trillion.
two/three/four etc trillion
Japan's exports were worth $43 trillion last year.
trillions of pounds/dollars etc
the trillions of dollars in the bond markets
an extremely large number of people or things
a shirt with a trillion holes in it
We've made this mistake trillions of times before.
3 British English old use
the number 1,000,000,000,000,000,000
—trillionth noun [countable]