noun Date: 1649 a gate or passage in a fortified place for use by troops making a sortie, a secure entryway (as at a prison) that consists of a series of doors or gates
SALLY PORT
Meaning of SALLY PORT in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012