Not clear or precise; indistinct or imprecise—used when information, explanations, or decisions are not definite.
計画の目的が不明確なので、まず目的をはっきりさせよう。
The project's goals are unclear, so let's clarify the objectives first.
彼の回答は不明確で、会議では結論が出なかった。
His answer was unclear, and no conclusion was reached at the meeting.
証拠が不明確な場合、断定することは難しい。
When the evidence is unclear, it is difficult to make a definite judgment.