trillion

Universal Words number (plural verb) 1 1000000000000; one million million HELPNOTE You say a, one, two, several, etc. trillion without a final 's' on 'trillion'. Trillions (of...) can be used if there is no number or quantity before it. Always use a plural verb with trillion or trillions. 2 (a trillion or trillions) (informal) a very large amount HELPNOTE There are more examples of how to use numbers at the entry for hundred. 3 (old-fashioned, BrE) 1000000000000000000; one million million million