izzard /ˈɪ.zə(ɹ)d/noun 1forms 1phrases 1 noun1 •(Scotland) The letter Z; zed, zee.... [Reading.] Dear Sir,—ay, that's that. Then there's an M, and a T, and an S, but whether the next be an izzard, or an R, confound me, I cannot tell. — 1773 formsizzards Phrases with izzard from A to izzardFrom beginning to end; thoroughly; covering the whole range or scope.