raglan sleeve means: Raglan sleeves are sleeves that reach beyond the shoulders and all the way down to the neckline. They create a diagonal seam running from the armpit to the neck. The name Raglan Sleeve is a tribute to Lord Fitzroy Somerset (First Baron Raglan), Commander-in Chief of the Crimean War. You can think of it as a mix of ‘The Charge of the Light Brigade,’ and sportswear. (in Fashion Dictionary)