Webster’s Revised Unabridged Dictionary · 1913
Escalade
Es′ca·lade′ (ĕs′kȧ·lād′), n. [F., Sp. escalada (cf. It. scalata), fr. Sp. escalar to scale, LL. scalare, fr. L. scala ladder. See Scale, v. t.] (Mil.) A furious attack made by troops on a fortified place, in which ladders are used to pass a ditch or mount a rampart.
Sin enters, not by escalade, but by cunning or treachery. Buckminster.
Es′ca·lade′, v. t. [imp. & p. p. Escaladed; p. pr. & vb. n. Escalading.] (Mil.) To mount and pass or enter by means of ladders; to scale; as, to escalate a wall.