ETYM U.S.
Either of two low shelters on either side of a baseball diamond where the players and coaches sit during the game.
In World War I, term for any underground shelter for troops. Dug-outs were generally excavated close to the trench line to provide places for troops to rest, sleep, or eat in some degree of safety and comfort.
The term was also used to refer to elderly officers and men who had retired from military service prior to the war but who volunteered to serve again in administrative and training posts.

A boat made by hollowing out a large log. dug-out.