1. A statement, phrase, or way of communicating that is ambiguous, vague, or difficult to understand
His unclear expression left everyone confused about what he meant.
Sua expressão pouco clara deixou todos confusos sobre o que ele quis dizer.
2. A lack of clarity in the way something is conveyed or articulated
The unclear expression in the contract led to disputes between the parties.
A expressão pouco clara no contrato levou a disputas entre as partes.