Alternative form of open-source

To choose not to participate in something.

(intransitive) To choose; select.

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.

Of, related to, or typical of opera.

(obsolete) Talkative; eager to speak. / With the mouth open. / Gaping in surprise, wonder or astonishment.