WordReference Random House Unabridged Dictionary of American English © 2026
cas•tel•lum
(ka stel′əm),USA pronunciation n., pl. cas•tel•li (ka stel′ī).USA pronunciation [Archaeol.]
- Archaeologya small isolated fortress, or one of a series of such fortresses, of the ancient Romans.
- *castrelom, equivalent. to castr(a) (neuter plural) fortified camp + *-elom diminutive suffix; see -ule, -elle
- *castṛlom
- *casterlom
- Latin: fortified settlement, fortress
'castellum' also found in these entries (note: many are not synonyms or translations):