plain ‧ tiff /ˈpleɪntəf, ˈpleɪntɪf/ BrE AmE noun [countable]
[ Date: 1300-1400 ; Language: Old French ; Origin: plaintif ; ⇨ ↑ plaintive ]
someone who brings a legal action against another person in a court of law SYN complainant British English ⇨ defendant