(obsolete, poetic) An area of darkness; a place or region with no light. / Something which is opaque rather than translucent.

(transitive) To make, render (more) opaque.

Crowdsourcing.

present participle of open

Pertaining to the start or beginning of a series of events.

An act or instance of making or becoming open. / A gap permitting passage through. / An act or instance of beginning. / The first performance of a show or play by a particular troupe.

Acronym of Organization of Petroleum Exporting Countries.

A mind willing to consider new ideas.

Relating to, resembling, or containing opium. / (pharmacology) Soporific; inducing sleep or sedation. / Deadening; causing apathy or dullness.

(pharmacology) A drug, hormone or other substance derived from or related to opium. / Something that dulls the senses and induces a false and unrealistic sense of contentment.