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Definitions

well-defined

[wel-di-fahynd] / ˈwɛl dɪˈfaɪnd /
ADJECTIVE
clear
Synonyms
STRONGEST
clear-cut distinct explicit precise straightforward transparent unambiguous
WEAK
apparent audible comprehensible graspable intelligible legible lucent lucid obvious plain sharp spelled out unblurred understandable well-marked
Antonyms
STRONGEST
ambiguous fuzzy indefinite obscure questionable vague

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Spaces are well-defined and venerable terms in physics and math.

From The Wall Street Journal • Feb. 26, 2026

If Europe’s economic problem is well-defined, the political fix hasn’t been.

From The Wall Street Journal • Feb. 12, 2026

They include accomplished long takes and sensuous riffs on well-defined genres.

From Los Angeles Times • Dec. 12, 2025

You want to direct funds to the right recipients based on well-defined terms and time frames.

From MarketWatch • Dec. 6, 2025

She was tall and pretty with strong shoulders and well-defined muscles, and she always killed it on her routines.

From "Courage to Soar" by Simone Biles

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.