damage feasantPronunciation: /ˈfiːz(ə)nt/ English LawDefinition of damage feasant noun [mass noun] damage done on one person’s land by another person’s trespassing animal, which justifies the landowner in retaining the animal until compensated. adverb on grounds of damage caused to land or property: I can distrain the goods damage feasantOrigin: late 16th century: from Old French damage fesant 'doing damage'