From Longman Dictionary of Contemporary Englishunconstitutionalun‧con‧sti‧tu‧tion‧al /ˌʌnkɒnstəˈtjuːʃənəl $ -kɑːnstɪˈtuː-/ ●○○ AWL adjective PGnot allowed by the constitution (=set of rules or principles by which a country or organization is governed) claims that the president’s action was unconstitutional —unconstitutionally adverb
Examples from the Corpus
unconstitutional• Organized prayer in public schools is unconstitutional.• Other opponents said the legislation is unconstitutional.• That is not to say that all such restrictions are unconstitutional.• The 12-member Supreme Court had ruled in April that a 15 percent increase in the beer tax was unconstitutional.• Throughout the day, repeal supporters argued that the ban on some types of weapons is arbitrary and unconstitutional.• A total ban might also be opposed as an unconstitutional invasion of privacy.• If it should rule that the president's actions were unconstitutional it would be a big step toward his impeachment by Congress.• Even though federal courts have declared such displays unconstitutional, the issue keeps popping up, especially in the Bible Belt. 