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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

This provides an excellent opportunity for Congress to establish sensible criteria and well-defined remedies for each category of tariffs.

From MarketWatch • Feb. 23, 2026

"These theories assume that one is describing something with well-defined velocities and energies," explains Diana Kirschbaum.

From Science Daily • Jan. 15, 2026

Fortunately Washington recognizes that America’s prosperity depends on enabling technological innovation under fair, well-defined rules.

From The Wall Street Journal • Jan. 13, 2026

This would have led to well-defined thermodynamic and cosmological arrows of time, as we observe.

From "A Brief History of Time: And Other Essays" by Stephen Hawking

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