castellated

• IPA^(key): /ˈkastəleɪtɪd/

From Mediaeval Latin castellātus (“fortified, castellate”) + -ed (“forming past participles”). Equivalent to the past participle of castellate but attested earlier than other uses of the verb.

castellated (not comparable)

1. Castle-like: built or shaped like a castle.
   • 1686, Robert Plot, The Natural History of Stafford-shire, Ch. x, p. 448:

     ...A Castellated mansion...

   • 2004, Colm Toibin, The Master, p. 2:

     Finally he walked slowly into a vast Italian space, with towers and castellated roofs, and a sky the colour of dark blue ink, smooth and consistent.

2. (engineering) Having grooves or recesses on an upper face.
   • 1904, Alexander Bell Filson Young, The Complete Motorist, Ch. iv, p. 74:

     Castellated nuts are used throughout, with split pins.

3. Castled: having or furnished with castles.
   • 1809, Robert Ker Porter, Travelling Sketches in Russia & Sweden, Vol. I, Ch. iv, p. 30:

     ...This castellated island...

4. (rare) Housed or kept in a castle.
   • 1837, Walter Savage Landor, Works, Vol. II, p. 317:

     His unbiassed justice... struck horror into the heart of every castellated felon.

• castellated nut

• castle, castellation

From Mediaeval Latin castellum (“cistern”).

castellated (not comparable)

1. (obsolete) Synonym of enclosed, when used for fountains, cisterns, &c.
   • 1598, John Stow, A Suruay of London, p. 149:

     A fayre Conduite of sweete water, castellated in the middest of that warde and streete...

• "castellated, adj.", in the Oxford English Dictionary, Oxford: Oxford University Press