Antonyms of adj 91

1 sense of 91

Sense 1
ninety-one, 91, xci -- (being one more than ninety)

INDIRECT (VIA cardinal) -> ordinal -- (being or denoting a numerical order in a series; "ordinal numbers"; "held an ordinal rank of seventh")

Similarity of adj 91

1 sense of 91

Sense 1
ninety-one, 91, xci -- (being one more than ninety)
       => cardinal (vs. ordinal) -- (being or denoting a numerical quantity but not order; "cardinal numbers")