From WordNet (r) 2.0 (August 2003) [wn]:
shirt
n : a garment worn on the upper half of the body
v : put a shirt on
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Shirt \Shirt\, n. [OE. schirte, sherte, schurte; akin to Icel.
skyrta, Dan. skiorte, Sw. skjorta, Dan. ski["o]rt a
petticoat, D. schort a petticoat, an argon, G. schurz,
sch["u]rze, an argon; all probably from the root of E. short,
as being originally a short garment. See Short, and cf.
Skirt.]
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.
[1913 Webster]
Several persons in December had nothing over their
shoulders but their shirts. --Addison.
[1913 Webster]
She had her shirts and girdles of hair. --Bp. Fisher.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Shirt \Shirt\, v. t. & i. [imp. & p. p. Shirted; p. pr. & vb.
n. Shirting.]
To cover or clothe with a shirt, or as with a shirt.
--Dryden.
[1913 Webster]