1Having a subtle, fine distinction or nuance that is hard to put into words precisely.
このお茶は産地によって味が微妙に違う。
This tea's flavor differs subtly depending on where it's grown.
二人の関係には微妙な変化が見られた。
A subtle change could be seen in the relationship between the two of them.
発音の微妙な違いが意味を大きく変えることがある。
A subtle difference in pronunciation can sometimes drastically change the meaning.
色合いの微妙なグラデーションが美しい絵だった。
It was a beautiful painting with a delicate gradation of color.
2A situation or decision that is complicated and delicate, making it hard to reach a simple conclusion.
二社の合併交渉は今、微妙な局面を迎えている。
The merger negotiations between the two companies are now at a delicate stage.
隣国との外交関係は微妙なバランスの上に成り立っている。
Diplomatic relations with the neighboring country rest on a delicate balance.
審判の判定は微妙で、選手たちも納得していなかった。
The referee's call was a close one, and the players weren't convinced either.
3Doubtful or questionable — uncertain whether something can be trusted or believed.
その証言の信憑性は微妙だと専門家は指摘した。
Experts pointed out that the credibility of that testimony is questionable.
新しい治療法の効果はまだ微妙で、追加の研究が必要だ。
The effectiveness of the new treatment is still uncertain, and further research is needed.
天気予報では、明日の降水確率は微妙なところだ。
According to the weather forecast, tomorrow's chance of rain is right on the fence.
4Colloquial: not really good, kind of iffy — often written casually as ビミョー.
「新しいカフェどうだった？」「うーん、正直微妙だったかな。」
"How was the new cafe?" "Hmm, honestly it was kind of iffy."
あの映画、評判ではビミョーって聞いたけど実際どうかな。
I heard that movie's reviews were "meh," but I wonder how it actually is.
新しいルールについて、社員の反応は微妙だった。
The employees' reaction to the new rule was lukewarm.