A device used to remove the cap from a bottle / A device used to remove the cork from a bottle

(software) Of or relating to a product which is licensed to permit modifications and redistribution of its source code, as per The Open Source Definition.

(transitive) To release the source code of.

(software) The practice of providing open-source code for a product. / (software) Open-source software in general. / (espionage) Information that is in the public domain and available to everybody.

Alternative form of open-source

A pair of small low-powered binoculars for use at a theatrical performance.

Unrestricted by definite limits. / Adaptable to change. / Permitting a spontaneous or unstructured response.

plural of opera glass

One or more pairs of small low-powered binoculars for use by members of the audience at a theatrical performance.

(transitive or intransitive) To perform a work or labour; to exert power or strength, physical or mechanical; to act.