noun 1.a scaling or mounting by means of ladders, especially in an assault upon a fortified place.
verb (used with object) 2.to mount, pass, or enter by means of ladders.
Origin: 1590–1600; <
Middle French <
Old Provençal *escalada, equivalent to
escal(
ar) to
scale3 +
-ada -ade1 Related forms es·ca·lad·er, noun