Causing conflict.
Subject to or troubled by attacks, controversy, or pressure.
Having an upper edge or outline of alternating square indentations and extensions like battlements, unless the embattled item is a pale, cross or saltire, in which case it has the crenelations on all sides.
Of a place: occupied or surrounded by armed troops (also figuratively).
Of a place: strengthened so as to withstand attacks; fortified.
Armed or prepared for battle (literally or figuratively).
Of a fortress or other building, a wall, etc.: having battlements or crenellations; battlemented, crenellated.