Definition of t-shirts:
(n) :
(clothing) A lightweight shirt without buttons, usually with short sleeves and no collar. Often made of cotton and frequently bears a picture or slogan.
(n) :
(dated) An undershirt.
(n) :
Alternative spelling of T-shirt. [(clothing) A lightweight shirt without buttons, usually with short sleeves and no collar. Often made of cotton and frequently bears a picture or slogan.]