Русско-англо-русский юридический словарь

Constitutionality is the condition of acting in accordance with an applicable constitution; the status of a law, a procedure, or an act's accordance with the laws or guidelines set forth in the applicable constitution. When one of these (laws, procedures, or acts) directly violates the constitution, it is unconstitutional. All the rest are considered constitutional until challenged and declared otherwise, typically by courts through judicial review. (Wikipedia)

A coup or coup d'état (/ˌkuː deɪˈtɑː/; French: [ku deta], literally "blow of state"; plural: coups d'état, pronounced like the singular form; also known simply as an ousting, overthrow, takeover, or putsch) is the removal of an existing government from power, usually through violent means. Typically, it is an illegal, unconstitutional seizure of power by a political faction, the military, or a dictator. Many scholars consider a coup d'état successful when the usurpers seize and hold power for at least seven days. (Wikipedia)

Warren argued that each of the cases cited included examples of "incommunicado interrogation of individuals in a police-dominated atmosphere, resulting in self-incriminating statements without full warnings of constitutional rights" [...]. Chief Justice Warren said the court "recognized that coercion can be mental as well as physical, and that the blood of the accused is not the only hallmark of an unconstitutional inquisition." (Ballotpedia)

ECOWAS, the regional grouping of West African countries, condemned “in the strongest terms” the seizure of power and reaffirmed its “unreserved condemnation of any seizure or retention of power by unconstitutional means.” (The House of Commons Library)