crystal clear
Proposed by a contributor, not yet supported by evidence.
Meaning · English
Completely understandable or transparent
Literally: transparent like crystal
Where it’s used:
Used
Widespread English
Examples
The swimming is safe and very tempting in the lake's crystal clear waters.
How typical it was of Luke to make his position so crystal - clear, drawing the line almost brutally in his determination that she shouldn't make any personal conclusions from his offer.
British National Corpus sentence via the MAGPIE corpus (CC BY 4.0, retrieved 2026-07-30)
Sources & notes
Listed in Wiktionary’s “English idioms” category (retrieved 2026-07-29); definition pending editorial review. Definition drafted by AI (@cf/meta/llama-3.3-70b-instruct-fp8-fast) and auto-approved by rule on 2026-07-30; pending editor spot-check.
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Common questions
What does “crystal clear” mean?
Completely understandable or transparent Literally: transparent like crystal
Is “crystal clear” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.
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