Definition of vallum in English:

vallum

Line breaks: val¦lum
Pronunciation: /ˈvaləm/

Entry from British & World English dictionary

noun

(In ancient Rome) a defensive wall, rampart, or stockade.

Origin

Latin, collective from vallus 'stake, palisade'.

Definition of vallum in:

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Word of the day hubris
Pronunciation: ˈhjuːbrɪs
noun
excessive pride or self-confidence