Superlative form of clear: most clear. Most clear.(adjective)
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Use "clearest" in a sentence
"He described to me what he called the clearest case of talent he had ever worked with."
"Of all the answers assembled by Watson, the clearest comes from the American philosopher John Dewey in 1915, who summed up German civilisation as a "self-conscious idealism with unsurpassed technical efficiency and organisation"."
"You as the viewer, fill in the blanks, and what comes through clearest is how much these two creatures depend on one another and protect one another."