Having little or no light; not bright (a place or space).
部屋が暗いので電気をつけた。
The room was dark, so I turned on the light.
夜道は暗いから気を付けて歩いてください。
Be careful walking — the street at night is dark.
映画館の中は観客のために暗くなっている。
The inside of the movie theater is dark for the audience.
Feeling down or dispirited; gloomy mood or expression.
彼は最近ずっと暗い顔をしている。
He's had a gloomy expression lately.
試験に落ちてから彼女は少し暗くなった。
After failing the exam she became a bit down.
Dark (in color) or dull; not bright or vivid in hue.
彼女は暗い青のコートを着ていた。
She was wearing a dark blue coat.
その絵は全体的に暗い色調だ。
The painting has an overall dark color scheme.
暗い茶色の髪が風に揺れた。
Her dark brown hair swayed in the wind.
Ominous, ill-boding, or suspicious; giving a sense something bad or secretive may be going on.
彼の過去には暗い噂がある。
There are dark rumors about his past.
あの建物は外観も内装もどこか暗くて怖い。
That building feels eerie and ominous both inside and out.
Unlikely to succeed; hopeless or unpromising (in outlook or prospects).
経営状態が悪く、会社の将来は暗いと言われている。
The company's financial condition is poor; people say its future looks bleak.
この計画は問題が多く、成功の見込みは暗い。
This plan has many problems; prospects for success are slim.
Unfamiliar with or ignorant of a particular field or subject (used as '〜に暗い').
私は政治に暗いので、新聞を読むようにしている。
I'm not well informed about politics, so I try to read the newspaper.
彼はパソコンに暗く、新しいソフトの使い方が分からない。
He's not good with computers and doesn't know how to use the new software.
地理に暗い学生が多いので、基礎から教えた。
There were many students weak in geography, so I taught from the basics.