 billionth |
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| 1. | [ noun ] (in the U.S.) position 1,000,000,000 in a countable series of things | |
| Related terms: | rank US | |
| 2. | [ adjective ] the ordinal number of one billion in counting order | |
| Related terms: | ordinal | |
| 3. | [ noun ] (mathematics) one part in a billion | |
| Synonyms: | one-billionth | |
| Related terms: | common_fraction | |
