castellated

• IPA^(key): /ˈkastəleɪtɪd/

From Medieval 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, chapter X, in The Natural History of Stafford-shire, page 448:

     ...A Castellated mansion...

   • 2004, Colm Toibin, The Master, page 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.

   • 2020 August 26, Tim Dunn, “Great railway bores of our time!”, in Rail, page 46:

     Three castellated (with battlements) towers stand sentry here, with one being particularly large. This is said to have been used by Rhodes as a belvedere, and (according to some sources) by railway staff for some time after opening.

2. (engineering) Having grooves or recesses on an upper face.
   • 1904, Alexander Bell Filson Young, chapter IV, in The Complete Motorist, page 74:

     Castellated nuts are used throughout, with split pins.

3. Castled: having or furnished with castles.
   • 1809, Robert Ker Porter, chapter IV, in Travelling Sketches in Russia & Sweden, volume I, page 30:

     ...This castellated island...

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

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

• castle, castellation

From Medieval Latin castellum (“cistern”).

castellated (not comparable)

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