shirtsleevePronunciation: /ˈʃəːtsliːv/Translate shirtsleeve | into German | into Spanish Definition of shirtsleeve noun (usually shirtsleeves) the sleeve of a shirt:he rolled up his shirtsleevesPhrases in (one's) shirtsleeves wearing a shirt with nothing over it: estate agent types in their shirtsleevesDerivatives shirtsleeved adjective shirtsleeve in other Oxford dictionaries Definition of shirtsleeve in the US English dictionary