Light, bright, or well-lit; having plenty of light or illumination.
この部屋は窓が大きくて明るい。
This room has large windows and is bright.
朝の光で道が明るくなった。
The road brightened with the morning light.
明るい照明の下で勉強すると疲れにくい。
Studying under bright lighting makes you less likely to get tired.
Bright (in color); vivid or light-colored rather than dark.
明るい色の服を着ると気分が上がる。
Wearing bright-colored clothes lifts your mood.
彼女は明るい赤いドレスを選んだ。
She chose a bright red dress.
Cheerful, upbeat, or sunny in disposition; lively and friendly.
彼女はいつも明るく、周りを元気にする。
She is always cheerful and lifts the spirits of those around her.
面接では明るい印象を与えることが大切だ。
It's important to give a bright/positive impression in interviews.
明るい声で歌を歌う。
Sing a song in a cheerful/bright voice.
Promising or hopeful (e.g., prospects, future); encouraging and likely to turn out well.
新製品の売れ行きは明るい見通しだ。
The sales outlook for the new product is promising.
若い世代は明るい未来を築けるだろう。
The younger generation will likely build a bright future.
Knowledgeable or well-versed in a particular field; used as '〜に明るい' to mean familiar with something.
彼はコンピューターに明るいから、設定を手伝ってくれる。
He's good with computers, so he'll help with the setup.
旅行に明るいガイドが案内してくれた。
A guide who knew the travel area well led us.
法律に明るくないので専門家に相談した。
I'm not well-versed in the law, so I consulted an expert.
Fair, clean, or transparent (e.g., politics or dealings); free from corruption or hidden problems.
市民は明るい政治を求めて声を上げた。
Citizens raised their voices demanding transparent/clean politics.
会計が明るくない会社には投資を避けた方がいい。
You should avoid investing in companies whose accounts are not transparent.