If something is unconstitutional, it breaks the rules of a political system.
例句
The Moldavian parliament has declared the elections unconstitutional...摩尔达维亚议会已宣布选举违宪。Banning cigarette advertising would be unconstitutional, since selling cigarettes is legal.既然出售香烟是合法的,那么禁止做香烟广告就是违宪的。
英汉词典释义
adj.
违反宪法的,不符合章程〔法规〕的
The prospect for passage of the bill was somewhat cloudy,in view of its evident unconstitutionality.由于这个议案明显地违反了宪法,它能否得到通过的前景就有点不明显了。
英英词典释义
Adjective
1. not consistent with or according to a constitution; contrary to the U.S. Constitution