To an unusual, remarkable or exceptional degree.(adverb)
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Use "exceptionally" in a sentence
"The most popular video game released this year - Grand Theft Auto IV - is available on both PlayStation 3 and Xbox 360, which made the title exceptionally popular."
"It said it was pleased with the Christmas trading as it came at a time of tough economic challenges and against what it described as an "exceptionally strong Christmas sales last year"."
"In a classic experiment conducted by Robert Rosenthal and Lenore Jacobson in the 1960s and replicated dozens of times since, pairs of children in classrooms were randomly given the label of exceptionally smart at the start of the school year."