Overview of noun billionth

The noun billionth has 2 senses

• billionth -- (position 1,000,000,000 in a countable series of things)


• one-billionth, billionth -- (one part in a billion equal parts)

Overview of adj billionth

The adj billionth has 1 sense

• billionth -- (the ordinal number of one billion in counting order)