dirtful adjective 1noun 1forms 3 adjective1 •(rare) Characterised by dirt or dirtiness; dirtyIndia very hot, very dirtful. — 1993 noun1 •An amount of dirtActually, the work became one of personal pride, and each dirtful was carefully laid on the side of the hole until there was a pretty good foxhole being dug. — 2000 formsdirtfuls · more dirtful · most dirtful