Definition from Wiktionary, the free dictionary
See also: crystal-clear
- (idiomatic) Completely clear and understood.
- Reread through the manual until the instructions are crystal clear in your head.
- (idiomatic) Visually clear, a sharp image, high acuity.
- The picture on this TV is crystal clear – you can see every grain of sand!
In sense “understanding”, used both of explanations (by speaker) – “Her explanation of integration was crystal clear,” – and of understanding (by listener) “Is this crystal clear in that thick head of yours?”
- clear as a bell (of sound)
completely clear and understood
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