Definitions
1.nounA pair of binoculars.
2.nounAny binocular glass, such as an opera glass, telescope, or microscope.
3.adjectiveUsing two eyes or viewpoints; especially, using two eyes or viewpoints to ascertain distance."a binocular microscope or telescope"
4.nounA hand-held device consisting of a series of lenses and prisms, used to magnify objects so that they can be better seen from a distance, and looked at through both eyes.