Sang or spoke softly and gently, often in a sentimental or affectionate way.
Past tense of 'croon,' from Dutch 'kronen' or Old Norse, meaning to make a long, low sound. Popular since the 1930s to describe smooth jazz and pop singing styles.
Bing Crosby made 'crooning' an art form in the 1930s-40s, and his style literally changed recording technology—engineers had to invent the microphone technique of singing super close because his voice was so soft and intimate.
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