Definition of field glass in English:

field glass

noun

  • Originally: a small telescope for use outdoors (now historical). Later: (in plural and less commonly singular) a hand-held optical instrument for viewing distant objects outdoors and having a lens for each eye, so as to give a stereoscopic view; a pair of binoculars.

Origin

Late 18th century. From field + glass.

Pronunciation

field glass

/ˈfiːld ɡlɑːs//ˈfiːld ɡlas/