noun plural rai·sons d'é·tat [re-zawn dey-ta] /rɛ zɔ̃ deɪˈta/ French.
a purely political reason for governmental action, based on the national interest and often violating principles of justice.
Origin of raison d'état
literally, reason of state
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
from French raison d'état "reason of state," thus "convenience of the government."
Online Etymology Dictionary, © 2010 Douglas Harper