n.
That which keeps or protects; a stronghold; a fortress; a castle; specifically, the strongest and securest part of a castle, often used as a place of residence by the lord of the castle, especially during a siege; the donjon. See Illust. of Castle. →
adv.
To a great distance in time from any point; remotely; as, he pushed his researches far into antiquity. →
n.
The general aspect or habit of a species, or group of species, esp. with reference to its adaptation to its environment. →
a.
Of or pertaining to a revolution in government; tending to, or promoting, revolution; as, revolutionary war; revolutionary measures; revolutionary agitators. →