billion A2 Topic:Numbers & Quantity US /ˈbɪljən/ See IPA manual Freq #2757 Meanings 1 num The number 1,000,000,000; one thousand million. The company is worth over a billion dollars. 2 noun A very large but unspecified number. I've told you a billion times to lock the door. Thesaurus Synonyms 1 num · the number 1,000,000,000;... thousand millionmilliard 2 noun · a very large but... zilliongazillion Word family Forms billions Derived forms barbillionbillionairecentibillionmegabillionmulti-billionmultibillionmultibillions Related forms gazilliongiga-quadrilliontrillionzillion Etymology AI details From French billion, equivalent to bi- (“two”) + -illion. billion French View etymology graph -> Topics Numbers & Quantity External links Cambridge Dictionary Wiktionary Google Images # billion **Type:** Word **Level:** A2 **Part of speech:** num, noun **IPA (US):** /ˈbɪljən/ **Frequency rank:** 2757 ## Meanings 1. The number 1,000,000,000; one thousand million. 2. A very large but unspecified number. ## Examples - The company is worth over a billion dollars. - I've told you a billion times to lock the door. ## Derived Forms - barbillion - billionaire - centibillion - megabillion - multi-billion - multibillion - multibillions ## Related Forms - gazillion - giga- - quadrillion - trillion - zillion ## Roots and Affixes - Root: billion ## Etymology From French billion, equivalent to bi- (“two”) + -illion. ## AI Etymology Billion comes from French billion, equivalent to bi- (“two”) + -illion. ## Topics - Numbers & Quantity markdown