castellated /ˈkastəleɪtɪd/ adjective5 •Castle-like: built or shaped like a castle; usually, specifically, having castellations (crenellations)....A Castellated mansion... — 1686 •Having grooves or recesses on an upper face.Castellated nuts are used throughout, with split pins. — 1904 •Castled: having or furnished with castles....This castellated island... — 1809 •(rare) Housed or kept in a castle.His unbiassed justice... struck horror into the heart of every castellated felon. — 1837 •(no longer used) Synonym of enclosed, when used for fountains, cisterns, &c.A fayre Conduite of sweete water, castellated in the middest of that warde and streete... — 1598 formsmore castellated · most castellated