n. 25B6; adjective
a derelict building : DILAPIDATED, ramshackle, run down, tumbledown, in ruins, falling apart; rickety, creaky, deteriorating, crumbling; neglected, untended, gone to rack and ruin.
a derelict airfield : DISUSED, abandoned, deserted, discarded, rejected, neglected, untended.
(N. Amer.) he was derelict in his duty : NEGLIGENT, neglectful, remiss, lax, careless, sloppy, slipshod, slack, irresponsible, delinquent.
25B6; noun the derelicts who survive on the streets : TRAMP, vagrant, vagabond, down-and-out, homeless person, drifter; beggar, mendicant; outcast; informal dosser, bag lady; N. Amer. informal hobo, bum.