D defs.my
Entry 1 sense Webster, 1913

Undershirt

/ŭn'-dẽrsh-ẽrtˌ/ · Un·der·shirt · IPA /ˈʌndərʃˌɜrt/
01 n. A shirt worn next the skin, under another shirt; -- called also undervest.
  1. 1.
    A shirt worn next the skin, under another shirt; -- called also undervest. Also: undervest