Antonyms of adj ex_post_facto

1 sense of ex post facto

Sense 1
ex post facto, retroactive, retro -- (affecting things past; "retroactive tax increase"; "an ex-post-facto law"; "retro pay")

INDIRECT (VIA retrospective) -> prospective -- (of or concerned with or related to the future; "prospective earnings"; "a prospective mother"; "a prospective bride"; "the statute is solely prospective in operation")

Similarity of adj ex_post_facto

1 sense of ex post facto

Sense 1
ex post facto, retroactive, retro -- (affecting things past; "retroactive tax increase"; "an ex-post-facto law"; "retro pay")
       => retrospective (vs. prospective) -- (concerned with or related to the past; "retrospective self-justification")