Having definite and distinct lines or features: a well-defined silhouette. (adjective)
Accurately and unambiguously stated or described: a well-defined argument. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "well-defined" in a sentence
"We need to have a well-defined political language, similar to Europe."
"Talking about Down Syndrome as a way of talking about Special Education is highly misleading – Down Syndrome is a well-defined, easily diagnosed biological condition."
"German Chancellor Angela Merkel, The self-declared ‘chancellor of all Germans’ has been described as Frau Europe, the European dominatrix of international back-room deal-making, but now the chancellor wanes with poll ratings dropping daily, reputation in tatters, brushing off valid criticism for being foolhardily unpredictable in her stubbornness and offering hollow excuses, while demonstrating a lack of a well-defined image or clear identity, seen as aloof, apathetic, strangely indolent and removed."