Antonyms of adj unconstitutional

1 sense of unconstitutional

Sense 1
unconstitutional (vs. constitutional) -- (not consistent with or according to a constitution; contrary to the U.S. Constitution)

constitutional (vs. unconstitutional) -- (sanctioned by or consistent with or operating under the law determining the fundamental political principles of a government; "the constitutional right of free speech"; "constitutional government"; "constitutional guarantees")

Similarity of adj unconstitutional

1 sense of unconstitutional

Sense 1
unconstitutional (vs. constitutional) -- (not consistent with or according to a constitution; contrary to the U.S. Constitution)