A loose under-garment for the upper part of the body, made of cotton, linen, or other material; -- formerly used of the under-garment of either sex, now commonly restricted to that worn by men and boys.
- A garment for the upper part of the body, typically having a collar, sleeves, and a front opening.
- An undershirt.
- A nightshirt.
- keep (one's) shirt on Slang To remain calm or patient: The plane doesn't land for another hour, so keep your shirt on.
- lose (one's) shirt Slang To lose everything one has or owns.
- the shirt off (one's) back Slang The maximum one is able to give or lose: The only thing those swindlers didn't take was the shirt off my back.