adjective

covered with, full of, or resembling dust.

dusty old records

dirty,grimy,grubby,unclean,soiled,begrimed,befouled,mucky,sooty,stained,smudged,spotty,dust-covered,dust-filled,undusted,grungy,cruddy,manky,grotty,gungy,scungy,besmirched,powdery,crumbly,chalky,friable,granulated,granular,gritty,sandy