main street or boulevard

a type of interstellar cloud that is so dense that it obscures light from background stars; a dark nebula

the dark, cruel side of a matter or situation / (Star Wars) the dark side of The Force

a historical period where social disorder is so great due to war, disease, political disorder etc. that there is little or no cultural development; Dark Ages

dark matter

Dark Continent

everything

(colloquial) current boyfriend

(slang) Alternative form of 彼氏 (kareshi, “boyfriend”)

everyone, one and all