形容詞 well-defined:

1. having a clean and distinct outline as if precisely cut along the edges
   同義詞：chiseled
2. accurately stated or described
   同義詞：clear

well-de.fined

adj.（形容詞）
Having definite and distinct lines or features:
界限分明的：有明確的和清晰的線條或特征的：
例句：
a well-defined silhouette.
輪廓分明的側(cè)影

Accurately and unambiguously stated or described:
規(guī)定明確的：精確地、不含糊地聲明或描述的：
例句：
a well-defined argument.
明確的爭(zhēng)辯