Public blockade
Defined in 1 dictionary — Black's (1910)
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
A blockade which is not only established in fact, but is notified, by the government directing it, to other governments ; as distinguished from a simple blockade, which may be established by a naval officer acting upon his own discretion or under direction of superiors, without governmental notification. The Circassian, 2 Wall. 150, 17 L. Ed. 796.
Defined under Blockade in Black's Law Dictionary.