Definitions
1.AdjectiveCastle-like: built or shaped like a castle; usually, specifically, having castellations (crenellations).
2.AdjectiveHaving grooves or recesses on an upper face. Castellated holes on the edge a Printed Circuit Board
3.AdjectiveCastled: having or furnished with castles.
4.AdjectiveHoused or kept in a castle.
5.AdjectiveSynonym of enclosed, when used for fountains, cisterns, &c.