Antonyms of adj 400

1 sense of 400

Sense 1
four hundred, 400, cd -- (being one hundred more than three hundred)

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

Similarity of adj 400

1 sense of 400

Sense 1
four hundred, 400, cd -- (being one hundred more than three hundred)
       => cardinal (vs. ordinal) -- (being or denoting a numerical quantity but not order; "cardinal numbers")