Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun billionth

2 senses of billionth

Sense 1
billionth -- (position 1,000,000,000 in a countable series of things)
       => rank -- (relative status; "his salary was determined by his rank and seniority")

Sense 2
one-billionth, billionth -- (one part in a billion equal parts)
       => common fraction, simple fraction -- (the quotient of two integers)

Antonyms of adj billionth

1 sense of billionth

Sense 1
billionth -- (the ordinal number of one billion in counting order)

INDIRECT (VIA ordinal) -> cardinal -- (being or denoting a numerical quantity but not order; "cardinal numbers")

Similarity of adj billionth

1 sense of billionth

Sense 1
billionth -- (the ordinal number of one billion in counting order)
       => ordinal (vs. cardinal) -- (being or denoting a numerical order in a series; "ordinal numbers"; "held an ordinal rank of seventh")