Definition of "shirt-sleeve" [shirt-sleeve]

• Describing an informal, relaxed appearance or approach, particularly in business. (adjective)

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• "In fact one of the astronomers interviewed by the Associated Press said that for a good portion of the time it would feature "shirt-sleeve weather.""
• "He rolled up his shirt-sleeve and compared the white underside if the arm with his face."
• "She had come back to his side, and she saw him double his arm at the elbow, the biceps crawling under his shirt-sleeve and swelling into a knot of muscle, heavy and hard."