adj. 25B6; adjective
the seedy world of prostitution : SORDID, disreputable, seamy, sleazy, squalid, unwholesome, unsavoury.
a seedy block of flats : DILAPIDATED, tumbledown, ramshackle, falling to pieces, decrepit, gone to rack and ruin, run down, down at heel, shabby, dingy, slummy, insalubrious, squalid; informal crummy; Brit. informal grotty.
high-class.